|
| year | production | consumption |
| 1984 | 105.01 | 108.37 |
| 1985 | 103.93 | 114.17 |
| 1986 | 115.64 | 127.25 |
| 1987 | 134.30 | 145.15 |
| 1988 | 134.32 | 143.85 |
| 1989 | 126.17 | 144.42 |
| 1990 | 134.20 | 153.68 |
| 1991 | 130.75 | 145.68 |
| 1992 | 134.32 | 142.37 |
| 1993 | 148.63 | 171.70 |
| 1994 | 151.67 | 162.14 |
| 1995 | 159.05 | 179.98 |
| 1996 | 151.17 | 185.85 |
| 1997 | 148.67 | 161.50 |
| 1998 | 162.87 | 138.14 |
| 1999 | 157.60 | 168.74 |
| 2000 | 135.46 | 184.77 |
| 2001 | 150.02 | 178.75 |
| 2002 | 157.79 | 196.17 |
| 2003 | 165.28 | 200.73 |
| 2004 | 156.23 | 217.85 |
| 2005 | 155.36 | 216.78 |
| 2006 | 154.29 | 246.20 |
| 2007 | 143.40 | 280.58 |
| 2008 | 144.27 | 300.18 |
| 2009 | 104.27 | 280.92 |
| 2010 | 109.17 | 297.42 |
|
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