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. 2016 Feb 27;107:1405–1422. doi: 10.1007/s11192-016-1893-6

Table 5.

Number of papers, number and proportion of papers in the Twitter Index, as well as sum of tweets, tweets per paper, and median Twitter percentiles for those countries with at least 1000 papers in the Twitter Index

Country All papers TI papers Proportion of papers in TI Sum of tweets Tweets per paper Median TP
Denmark 23,583 1330 5.6 22,460 16.9 55.4
Finland 20,502 1278 6.2 19,336 15.1 54.4
Norway 18,848 1009 5.4 12,349 12.2 53.1
UK 141,236 9956 7.0 143,125 14.4 52.1
Canada 98,649 6230 6.3 65,958 10.6 52.0
Australia 78,780 4787 6.1 54,173 11.3 51.5
Sweden 35,080 1947 5.6 27,052 13.9 51.2
Spain 90,510 3915 4.3 38,399 9.8 50.3
Belgium 28,780 1433 5.0 13,847 9.7 50.2
USA 724,091 50,823 7.0 686,221 13.5 50.1
Netherlands 60,390 4885 8.1 51,437 10.5 49.1
Switzerland 36,838 2379 6.5 24,495 10.3 49.0
Israel 18,467 1004 5.4 10,405 10.4 48.5
Brazil 82,866 1264 1.5 9050 7.2 48.4
Germany 168,769 8888 5.3 72,967 8.2 48.0
Japan 164,930 6137 3.7 46,473 7.6 48.0
Italy 124,321 4254 3.4 34,675 8.2 47.6
China 304,361 7225 2.4 37,071 5.1 47.5
India 76,138 1195 1.6 5603 4.7 47.5
France 138,431 6567 4.7 55,649 8.5 46.6
South Korea 97,786 2303 2.4 13,474 5.9 46.6
Taiwan 61,120 1776 2.9 6893 3.9 45.6

Many papers are multiply counted, because they belong to more than one country