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| Year | Gg CO2 equivalent |
|---|---|
| 1990 | 3,211.70 |
| 1991 | 3,487.37 |
| 1992 | 3,576.65 |
| 1993 | 3,617.58 |
| 1994 | 3,209.68 |
| 1995 | 3,325.21 |
| 1996 | 3,486.07 |
| 1997 | 3,268.11 |
| 1998 | 3,479.85 |
| 1999 | 3,560.62 |
| 2000 | 3,511.70 |
| 2001 | 3,673.27 |
| 2002 | 3,824.38 |
| 2003 | 4,014.19 |