Distribution of articles by location and timeframe
| Location | Timeframe | Total | % | ||
|---|---|---|---|---|---|
| 2000-2011 | 2012-2019 | 2020-2025 | |||
| Finland | 0 | 3 | 0 | 3 | 5 |
| Germany | 0 | 1 | 0 | 1 | 2 |
| Greece | 0 | 0 | 1 | 1 | 2 |
| Italy | 1 | 3 | 3 | 7 | 12 |
| Portugal | 1 | 1 | 1 | 3 | 5 |
| Spain | 0 | 4 | 1 | 5 | 9 |
| UK | 4 | 4 | 19 | 27 | 47 |
| Multiple | 0 | 1 | 9 | 10 | 18 |
| Europe | 6 | 17 | 34 | 57 | 100 |
| Australia | 2 | 1 | 1 | 4 | 7 |
| China | 0 | 1 | 18 | 19 | 35 |
| India | 0 | 3 | 11 | 14 | 26 |
| Indonesia | 0 | 2 | 3 | 5 | 9 |
| Japan | 1 | 2 | 0 | 3 | 6 |
| Malaysia | 2 | 3 | 0 | 5 | 9 |
| Pakistan | 0 | 0 | 2 | 2 | 4 |
| Multiple | 0 | 2 | 0 | 2 | 4 |
| Asia-Pacific | 5 | 14 | 35 | 54 | 100 |
| Brazil | 0 | 1 | 0 | 1 | 2 |
| Canada | 1 | 1 | 0 | 2 | 4 |
| USA | 1 | 12 | 33 | 46 | 92 |
| Multiple | 0 | 1 | 0 | 1 | 2 |
| The Americas | 2 | 15 | 33 | 50 | 100 |
| Egypt | 0 | 3 | 2 | 5 | 26 |
| Iran | 0 | 0 | 1 | 1 | 5 |
| Iraq | 0 | 0 | 1 | 1 | 5 |
| Jordan | 0 | 1 | 4 | 5 | 26 |
| Qatar | 0 | 1 | 0 | 1 | 5 |
| Saudi Arabia | 0 | 0 | 4 | 4 | 21 |
| UAE | 1 | 1 | 0 | 2 | 11 |
| Middle East | 1 | 6 | 12 | 19 | 100 |
| Ghana | 0 | 1 | 0 | 1 | 8 |
| Kenya | 0 | 0 | 1 | 1 | 8 |
| Nigeria | 0 | 0 | 1 | 1 | 8 |
| South Africa | 0 | 1 | 4 | 5 | 38 |
| Tunisia | 0 | 1 | 3 | 4 | 31 |
| Multiple | 0 | 1 | 0 | 1 | 8 |
| Africa | 0 | 4 | 9 | 13 | 100 |
| Multiple across different regions | 1 | 4 | 11 | 16 | 100 |
| Total | 15 | 60 | 134 | 209 | |
| % | 7 | 29 | 64 | 100 | |
| Location | Timeframe | Total | % | ||
|---|---|---|---|---|---|
| 2000-2011 | 2012-2019 | 2020-2025 | |||
| Finland | 0 | 3 | 0 | 3 | 5 |
| Germany | 0 | 1 | 0 | 1 | 2 |
| Greece | 0 | 0 | 1 | 1 | 2 |
| Italy | 1 | 3 | 3 | 7 | 12 |
| Portugal | 1 | 1 | 1 | 3 | 5 |
| Spain | 0 | 4 | 1 | 5 | 9 |
| 4 | 4 | 19 | 27 | 47 | |
| Multiple | 0 | 1 | 9 | 10 | 18 |
| Australia | 2 | 1 | 1 | 4 | 7 |
| China | 0 | 1 | 18 | 19 | 35 |
| India | 0 | 3 | 11 | 14 | 26 |
| Indonesia | 0 | 2 | 3 | 5 | 9 |
| Japan | 1 | 2 | 0 | 3 | 6 |
| Malaysia | 2 | 3 | 0 | 5 | 9 |
| Pakistan | 0 | 0 | 2 | 2 | 4 |
| Multiple | 0 | 2 | 0 | 2 | 4 |
| Brazil | 0 | 1 | 0 | 1 | 2 |
| Canada | 1 | 1 | 0 | 2 | 4 |
| 1 | 12 | 33 | 46 | 92 | |
| Multiple | 0 | 1 | 0 | 1 | 2 |
| Egypt | 0 | 3 | 2 | 5 | 26 |
| Iran | 0 | 0 | 1 | 1 | 5 |
| Iraq | 0 | 0 | 1 | 1 | 5 |
| Jordan | 0 | 1 | 4 | 5 | 26 |
| Qatar | 0 | 1 | 0 | 1 | 5 |
| Saudi Arabia | 0 | 0 | 4 | 4 | 21 |
| 1 | 1 | 0 | 2 | 11 | |
| Ghana | 0 | 1 | 0 | 1 | 8 |
| Kenya | 0 | 0 | 1 | 1 | 8 |
| Nigeria | 0 | 0 | 1 | 1 | 8 |
| South Africa | 0 | 1 | 4 | 5 | 38 |
| Tunisia | 0 | 1 | 3 | 4 | 31 |
| Multiple | 0 | 1 | 0 | 1 | 8 |
| Total | 15 | 60 | 134 | 209 | |
| % | 7 | 29 | 64 | 100 | |
This table displays the geographical and temporal distribution of the 209 RD studies, distinguishing countries, regions and periods from 2000 to 2025. Legend of abbreviations in alphabetical order: UAE = United Arab Emirates; UK = United Kingdom; USA = United States of America
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