Lev1: NIOBIUM TANTALUM ORE//PHOSPHATE FLUX//REFRACTORY MINERALS - Statistics for Countries |
Statistics per Country |
Number of publications, full counts |
Obs | Country | 1990-1994 | 1995-1999 | 2000-2004 | 2005-2009 | 2010-2014 | All years |
---|---|---|---|---|---|---|---|
1 | All countries | 12 | 6 | 20 | 13 | 32 | 83 |
2 | India | 2 | 1 | 6 | 3 | 4 | 16 |
3 | Russian Federation | 1 | 2 | 6 | 5 | 2 | 16 |
4 | China | . | . | . | 3 | 7 | 10 |
5 | South Africa | . | . | . | . | 9 | 9 |
6 | United States | 3 | 1 | 1 | . | 2 | 7 |
7 | Argentina | 1 | . | 3 | 1 | 1 | 6 |
8 | Brazil | 1 | 2 | 1 | . | . | 4 |
9 | Egypt | . | . | 2 | . | 1 | 3 |
10 | Australia | . | . | . | . | 2 | 2 |
11 | Canada | 1 | . | . | . | 1 | 2 |
12 | France | . | 1 | . | . | 1 | 2 |
13 | Poland | 1 | . | . | . | 1 | 2 |
14 | USSR | 2 | . | . | . | . | 2 |
15 | Ghana | . | . | . | 1 | . | 1 |
16 | Israel | . | . | 1 | . | . | 1 |
17 | Nigeria | . | . | . | . | 1 | 1 |
18 | Spain | . | . | . | . | 1 | 1 |
19 | United Kingdom | . | . | 1 | . | . | 1 |
Number of publications, full counts |