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 |