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Number of national publications.
| Country | Publications | Percentage | Year |
|---|---|---|---|
| USA | 690 | 0.78 | 1992 |
| PEOPLES R CHINA | 451 | 0.03 | 2004 |
| GERMANY | 138 | 0.21 | 1995 |
| JAPAN | 117 | 0.02 | 1994 |
| CANADA | 109 | 0.09 | 1996 |
| ENGLAND | 100 | 0.17 | 2000 |
| ITALY | 91 | 0.11 | 1993 |
| FRANCE | 81 | 0.12 | 1994 |
| NETHERLANDS | 48 | 0.02 | 1994 |
| AUSTRALIA | 34 | 0.06 | 2000 |
