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Table 2 Top 30 most productive countries for research output related to people aged 80 and over

From: Thematic research clusters in very old populations (≥ 80 years): a bibliometric approach

Country 2000–2004 2005–2009 2010–2014 2015–2019 TOTAL  
N % N % N % N % N % N publications per million inhabitants
USA 6 40 1627 32. 2233 27 2177 25.4 6043 27.7 18.4
Japan 2 13.3 594 11.9 1011 12.2 1471 17.2 3078 14.1 24.4
UK 2 13.3 526 10.5 647 7.8 558 6.5 1733 7.9 25.9
Italy 361 7.2 605 7.3 630 7.4 1596 7.3 26.5
Germany 239 4.8 524 6.3 563 6.6 1326 6.1 15.9
France 225 4.5 555 6.7 527 6.2 1307 6 19.5
Spain 1 6.7 193 3.9 508 6.1 587 6.9 1289 5.9 27.4
Australia 1 6.7 185 3.7 314 3.8 360 4.2 860 3.9 33.9
Canada 1 6.7 175 3.5 303 3.7 328 3.8 807 3.7 21.5
China 82 1.6 247 3 453 5.3 782 3.6 0.6
Netherlands 145 2.9 243 2.9 216 2.5 604 2.8 34.8
Switzerland 93 1.9 170 2.1 180 2.1 443 2 79.5
Sweden 97 1.9 160 1.9 184 2.1 441 2 42.9
Taiwan 1 6.7 115 2.3 164 2 161 1.9 441 2 19.1
Belgium 75 1.5 163 2 127 1.5 365 1.7 31.8
Turkey 1 6.7 78 1.6 154 1.9 131 1.5 364 1.7 4.4
South Korea 47 0.9 127 1.5 174 2 348 1.6 6.7
Greece 109 2.2 119 1.4 92 1.9 320 1.5 29.9
Israel 69 1.4 98 1.2 125 1.5 292 1.3 32.2
Brazil 37 0.7 125 1.5 130 1.5 292 1.3 1.4
Austria 51 1 79 1 92 1.1 222 1 25.0
Finland 36 0.7 83 1 88 1. 207 0.9 37.5
Portugal 17 0.3 59 0.7 110 1.3 186 0.8 18.11
Denmark 44 0.9 59 0.7 76 0.9 179 0.8 30.8
Singapore 26 0.5 53 0.6 83 1 162 0.7 28.4
Poland 15 0.3 60 0.7 65 0.8 140 0.6 3.7
Norway 25 0.5 52 0.6 62 0.7 139 0.6 26.0
New Zealand 21 0.4 60 0.7 57 0.7 138 0.6 28.1
Ireland 1 6.7 32 0.6 44 0.5 45 0.5 122 0.6 24.7
India 27 0.5 46 0.6 45 0.5 118 0.5 0.1