Road motor vehicles
Per thousand inhabitants

In 2006, ratios of motor vehicles to population ranged from 778 per thousand inhabitants in Portugal to 86 in Turkey. Over the periods shown in the table, ratios of vehicles to population increased in all countries except in the United States. Sharp increases of this ratio occurred in Portugal, Iceland, Greece and Poland. In 2006, road fatalities per million inhabitants ranged from over 230 per million inhabitants in Russian Federation to 49 in Sweden. Over the periods shown in the table, rates have decreased in all countries except in Iceland and in the Russian Federation with particularly sharp falls in Portugal, New Zealand and France. Road fatality rates per million inhabitants are an ambiguous indicator of road safety since the number of accidents depends to a great extent on the number of vehicles in each country. Rates per million vehicles are affected by driving habits, traffic legislation and the effectiveness of its enforcement, road design and other factors over which governments may exercise control. In 2006, fatality rates per million vehicles were less than 100 in Switzerland, Norway and Sweden, but exceeded 400 in Slovak Republic, Turkey and 1,100 in Russian Federation. Note that low fatality rates per million inhabitants may be associated with very high fatality rates per million vehicles. For example, a country with a small vehicle population may show a low fatality rate per million inhabitants but a high fatality rate per vehicle.
Gross domestic expenditure on R&D
As a percentage of GDP, 2006 or latest available year

Expenditure on research and development (R&D) is a key indicator of government and private sector efforts to obtain competitive advantage in science and technology. In 2005, research and development amounted to 2.3% of GDP for the OECD as a whole. The R&D data shown here have been compiled according to the guidelines of the Frascati Manual. It should, however, be noted that over the period shown, several countries have improved the coverage of their surveys of R&D activities in the services sector (Japan, Netherlands, Norway and United States) and in higher education (Finland, Greece, Japan, Netherlands, Spain and the United States). Other countries, including especially Italy, Japan and Sweden, have worked to improve the international comparability of their data. Some of the changes shown in the table reflect these methodological improvements as well as the underlying changes in R&D expenditures. For Korea, social sciences and the humanities are excluded from the R&D data. For the United States, capital expenditure is not covered. Data for Brazil and India are not completely according to Frascati Manual guidelines, and were compiled from national sources. Data for Brazil, India and South Africa are underestimated, as are the data for China before 2000.
Water abstractions
Cubic meters per capita, 2005 or latest available year

Most OECD countries increased their water abstractions over the 1960s and 1970s in response to demand by the agricultural and energy sectors. Since the 1980s, some countries have stabilized their abstractions through more efficient irrigation techniques, the decline of water-intensive industries (e.g. mining, steel), increased use of cleaner production technologies and reduced losses in pipe networks. More recently, this stabilization partly reflects consequences of droughts while population growth continues to drive increases in public supply. At world level, it is estimated that water demand rose by more than double the rate of population growth in the last century, with agriculture being the largest user of water. Water abstractions refer to freshwater taken from ground or surface water sources, either permanently or temporarily, and conveyed to the place of use. If the water is returned to a surface water source, abstraction of the same water by the downstream user is counted again in compiling total abstractions. Mine water and drainage water are included. Water used for hydroelectricity generation is an in situ use and is excluded. It should be borne in mind that the definitions and estimation methods employed by member countries may vary considerably and may have changed over time. In general, data availability and quality is best for abstractions for public supply, representing about 15% of the total water abstracted in OECD countries.
Population growth rates
Average annual growth in percentage, 1993-2006 or latest available period

The size and growth of a country’s population are both causes and effects of economic and social developments. The natural increase in population (births minus deaths) has slowed in all OECD countries, resulting in a rise in the average age of populations. In several countries, falling rates of natural increase have been partly offset by immigration from outside the OECD area. In 2006, OECD countries accounted for 18% of the world’s population of 6.5 billion. China accounted for 20% and India for 17%. Within OECD, the United States accounted for 25% of the OECD total, followed by Japan (11%), Mexico (9%), Germany (7%) and Turkey (6%). Between 1993 and 2006, the population growth rate for all OECD countries averaged 0.7% per annum. Growth rates much higher than this were recorded for Mexico and Turkey (high birth rate countries) and for Luxembourg, Australia, Canada, Ireland, New Zealand and United States (high net immigration). In the Czech Republic, Hungary and Poland, the population declined from a combination of low birth rates and net emigration. Growth rates were very low, although still positive, in Germany and the Slovak Republic. The population growth of OECD countries is expected to slow down in the coming decennia.