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| Year | Gg CO2 equivalent |
|---|---|
| 1990 | 23,746.84 |
| 1991 | 24,077.09 |
| 1992 | 25,747.77 |
| 1993 | 25,016.36 |
| 1994 | 25,220.78 |
| 1995 | 25,259.53 |
| 1996 | 26,362.69 |
| 1997 | 28,375.86 |
| 1998 | 27,037.86 |
| 1999 | 28,690.26 |
| 2000 | 29,196.46 |
| 2001 | 31,280.43 |
| 2002 | 32,047.22 |