NRI | |||
---|---|---|---|
Location of study | 1.0–0.2 (%)a | 0.2–0.0 (%) a | Total |
Canada | 42.8 | 57.2 | 824,970 |
USA | 39.4 | 60.5 | 86,320 |
UK | 38.0 | 62.0 | 76,660 |
Europe | 24.8 | 75.2 | 158,580 |
South America | 23.9 | 76.1 | 66,620 |
Africa | 26.4 | 73.6 | 50,050 |
Middle East | 24.8 | 75.2 | 34,780 |
China | 18.4 | 81.6 | 61,420 |
Asia | 23.5 | 76.5 | 288,160 |