|
| year | production | consumption |
| 1980 | | 91.00 |
| 1981 | 10.00 | 85.00 |
| 1982 | 15.00 | 82.00 |
| 1983 | 15.00 | 82.00 |
| 1984 | 17.00 | 85.00 |
| 1985 | 19.00 | 82.00 |
| 1986 | 29.00 | 83.00 |
| 1987 | 28.00 | 90.00 |
| 1988 | 33.00 | 94.00 |
| 1989 | 38.00 | 99.00 |
| 1990 | 40.00 | 107.00 |
| 1991 | 41.00 | 104.00 |
| 1992 | 38.19 | 109.00 |
| 1993 | 40.99 | 110.00 |
| 1994 | 39.50 | 120.00 |
| 1995 | 31.93 | 125.00 |
| 1996 | 36.52 | 125.00 |
| 1997 | 57.60 | 129.00 |
| 1998 | 46.92 | 129.00 |
| 1999 | 42.00 | 131.00 |
| 2000 | 36.00 | 133.82 |
| 2001 | 33.16 | 134.88 |
| 2002 | 30.39 | 140.72 |
| 2003 | 23.99 | 145.53 |
| 2004 | 19.52 | 150.27 |
| 2005 | 18.98 | 152.76 |
| 2006 | 17.08 | 154.32 |
| 2007 | 41.14 | 156.00 |
| 2008 | 59.99 | 157.31 |
| 2009 | 55.89 | 150.66 |
| 2010 | 53.04 | 152.53 |
| 2011 | 46.32 | 148.47 |
|
|
