| Control period | Class I substances in groups I and III,(In percent) | Class I substances in group II,(In percent) | Class I substances in group IV(In percent) | Class I substances in group V(In percent) | Class I substances in group VI(In percent) | Class I substances in group VII(In percent) |
|---|---|---|---|---|---|---|
| 1994 | 25 | 0 | 50 | 50 | 100 | 100 |
| 1995 | 25 | 0 | 15 | 30 | 100 | 100 |
| 1996 | 0 | 0 | 0 | 0 | 100 | 0 |
| 1997 | 0 | 0 | 0 | 0 | 100 | 0 |
| 1998 | 0 | 0 | 0 | 0 | 100 | 0 |
| 1999 | 0 | 0 | 0 | 0 | 75 | 0 |
| 2000 | 0 | 0 | 0 | 0 | 75 | 0 |
| 2001 | 50 | |||||
| 2002 | 50 | |||||
| 2003 | 30 | |||||
| 2004 | 30 | |||||
| 2005 | 0 |