|
| year | production | consumption |
| 1984 | 814.30 | 717.27 |
| 1985 | 765.26 | 696.18 |
| 1986 | 2,277.99 | 2,124.08 |
| 1987 | 1,822.92 | 1,741.23 |
| 1988 | 1,691.25 | 1,702.43 |
| 1989 | 1,632.85 | 1,588.79 |
| 1990 | 1,726.93 | 1,624.06 |
| 1991 | 1,665.27 | 1,590.16 |
| 1992 | 1,794.12 | 1,717.24 |
| 1993 | 1,869.30 | 1,728.67 |
| 1994 | 1,808.17 | 1,755.80 |
| 1995 | 1,860.04 | 1,820.25 |
| 1996 | 1,907.85 | 1,866.83 |
| 1997 | 2,016.38 | 1,839.34 |
| 1998 | 1,831.72 | 1,823.21 |
| 1999 | 1,883.07 | 1,820.35 |
| 2000 | 2,005.63 | 1,890.85 |
| 2001 | 2,034.12 | 1,874.98 |
| 2002 | 1,908.97 | 1,767.49 |
| 2003 | 1,935.03 | 1,712.60 |
| 2004 | 1,867.62 | 1,629.33 |
| 2005 | 1,923.68 | 1,702.66 |
| 2006 | 1,806.10 | 1,561.09 |
| 2007 | 1,535.48 | 1,272.80 |
| 2008 | 1,554.41 | 1,278.57 |
| 2009 | 1,565.16 | 1,203.25 |
| 2010 | 1,583.95 | 1,230.58 |
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