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| Year | Gg CO2 equivalent |
|---|---|
| 1990 | 23,594.11 |
| 1991 | 23,873.37 |
| 1992 | 25,632.75 |
| 1993 | 24,897.86 |
| 1994 | 25,134.51 |
| 1995 | 25,072.53 |
| 1996 | 26,118.62 |
| 1997 | 28,511.48 |
| 1998 | 27,045.43 |
| 1999 | 28,379.88 |
| 2000 | 28,905.79 |
| 2001 | 30,828.75 |
| 2002 | 30,864.67 |
| 2003 | 32,320.92 |