2018 tables: Countries/territories

Table criteria

The 2018 tables are based on Nature Index data from 1 January 2017 to 31 December 2017.

2017 Country/territory Share 2016 Share 2017
1 United States of America (USA) 20010.86 19858.41
2 China 8099.18 9224.27
3 Germany 4518.86 4425.41
4 United Kingdom (UK) 3737.23 3672.09
5 Japan 3178.34 3088.05
6 France 2330.13 2233.8
7 Canada 1581.45 1565.4
8 Switzerland 1349.95 1351.46
9 South Korea 1337.41 1292.86
10 Spain 1213.87 1104.08
11 Australia 1173.78 1097.22
12 Italy 1045.29 1035.9
13 India 905.2 958.84
14 Netherlands 936.91 915.53
15 Sweden 585.56 605.28
16 Singapore 556.54 597.88
17 Israel 593.85 587.71
18 Taiwan 444.17 424.31
19 Russia 398.22 408.99
20 Belgium 455.01 404.78
21 Austria 335.24 375.53
22 Denmark 396.9 361.22
23 Brazil 251.46 260.78
24 Poland 207.05 219.33
25 Finland 204.59 194.62
26 Czech Republic 172.65 194.04
27 Norway 162.1 189.38
28 Saudi Arabia 137.43 139.56
29 Portugal 141.67 134.66
30 New Zealand 121.93 128.58
31 Ireland 133.29 125.66
32 Chile 83.54 100.23
33 Argentina 93.57 97.74
34 Iran 91.02 88.05
35 Greece 88.46 82.96
36 Mexico 79.69 78.69
37 Hungary 77.32 77.02
38 South Africa 62.52 68.65
39 Turkey 73.47 59.06
40 Slovenia 36.14 40.72
41 Pakistan 28.74 39.64
42 Thailand 29.38 37.47
43 Croatia 21.07 27.48
44 Iceland 23.08 26.77
45 Estonia 22.16 26.09
46 Ukraine 27.52 21.38
47 Romania 25.28 21.2
48 Luxembourg 20.57 18.97
49 United Arab Emirates 17.33 18.81
50 Colombia 24.37 17.27

Each year, the Nature Index publishes tables based on counts of high-quality research outputs in the previous calendar year. Users please note:

  1. The data behind the tables are based on a relatively small proportion of total research papers, they cover the natural sciences only and outputs are non-normalized (that is, they don’t reflect the size of the country or institution, or its overall research output).
  2. The Nature Index is one indicator of institutional research performance. The metrics of Count and Share used to order Nature Index listings are based on an institution’s or country’s publication output in 82 natural-science journals, selected on reputation by an independent panel of leading scientists in their fields.
  3. Nature Index recognizes that many other factors must be taken into account when considering research quality and institutional performance; Nature Index metrics alone should not be used to assess institutions or individuals.
  4. Nature Index data and methods are transparent and available under a creative commons licence at natureindex.com.

The Nature Index database undergoes regular updating, corrections, adjustment of institutional hierarchies, and removal of retracted papers and thus the live website can differ from the frozen annual tables.

*The change in adjusted Share accounts for the small annual variation in the total number of articles in Nature Index journals. Share values have been adjusted to 2019 levels to calculate the percentage change. For more information on the adjustment, please see the Adjusted metric explainer.