|
| year | production | consumption |
| 1980 | 10.00 | 4,960.00 |
| 1981 | | 4,848.00 |
| 1982 | | 4,582.00 |
| 1983 | | 4,395.02 |
| 1984 | | 4,666.00 |
| 1985 | 11.00 | 4,436.00 |
| 1986 | 13.00 | 4,503.00 |
| 1987 | 12.00 | 4,567.00 |
| 1988 | 12.00 | 4,849.00 |
| 1989 | 11.00 | 5,058.00 |
| 1990 | 11.00 | 5,315.00 |
| 1991 | 14.92 | 5,389.00 |
| 1992 | 17.00 | 5,478.00 |
| 1993 | 12.45 | 5,395.00 |
| 1994 | 10.84 | 5,655.00 |
| 1995 | 11.00 | 5,693.00 |
| 1996 | 11.59 | 5,739.00 |
| 1997 | 9.95 | 5,702.00 |
| 1998 | 8.98 | 5,507.00 |
| 1999 | 7.92 | 5,642.00 |
| 2000 | | 5,515.43 |
| 2001 | 6.33 | 5,411.95 |
| 2002 | 5.33 | 5,318.76 |
| 2003 | | 5,428.41 |
| 2004 | | 5,318.77 |
| 2005 | 6.58 | 5,327.95 |
| 2006 | | 5,197.40 |
| 2007 | 5.67 | 5,037.04 |
| 2008 | | 4,788.42 |
| 2009 | 5.33 | 4,405.78 |
| 2010 | 4.99 | 4,464.73 |
| 2011 | | 4,480.50 |
|
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