| Country Name |
No. of Collaborations |
| England |
755 |
| United States of America |
647 |
| Germany |
365 |
| France |
274 |
| Italy |
181 |
| Spain |
159 |
| Scotland |
156 |
| Netherlands |
155 |
| Northern Ireland |
154 |
| Australia |
145 |
| Wales |
128 |
| Russia |
125 |
| Switzerland |
113 |
| Sweden |
110 |
| Belgium |
96 |
| Japan |
93 |
| Canada |
92 |
| Denmark |
82 |
| India |
70 |
| Finland |
60 |
| Peoples Republic of China |
60 |
| Portugal |
55 |
| Austria |
47 |
| Israel |
42 |
| Norway |
40 |
| Poland |
39 |
| Greece |
38 |
| Brazil |
25 |
| Hungary |
25 |
| Czech Republic |
20 |
| Romania |
20 |
| South Korea |
20 |
| New Zealand |
18 |
| Turkey |
18 |
| Slovenia |
16 |
| Kenya |
12 |
| South Africa |
12 |
| Chile |
11 |
| Macedonia |
9 |
| Slovakia |
9 |
| Bulgaria |
8 |
| Estonia |
8 |
| Latvia |
8 |
| Mexico |
8 |
| Singapore |
8 |
| Iceland |
7 |
| Lithuania |
7 |
| United Arab Emirates |
7 |
| Byelarus |
6 |
| Argentina |
5 |
| Egypt |
5 |
| Tanzania |
5 |
| Cyprus |
4 |
| Luxembourg |
4 |
| Malaysia |
4 |
| Thailand |
4 |
| Uganda |
3 |
| Bahrain |
2 |
| Colombia |
2 |
| Costa Rica |
2 |
| Croatia |
2 |
| Gambia |
2 |
| Pakistan |
2 |
| Panama |
2 |
| Saudi Arabia |
2 |
| Serbia |
2 |
| Ukraine |
2 |
| Vietnam |
2 |