|
| year | production | consumption |
| 1980 | 20,529.45 | 30,765.51 |
| 1981 | 21,897.42 | 34,183.78 |
| 1982 | 22,174.10 | 34,665.49 |
| 1983 | 21,893.01 | 37,759.68 |
| 1984 | 23,556.39 | 44,235.75 |
| 1985 | 24,849.40 | 49,522.44 |
| 1986 | 26,734.36 | 53,850.11 |
| 1987 | 26,757.51 | 52,386.25 |
| 1988 | 26,780.65 | 53,593.28 |
| 1989 | 22,911.54 | 50,623.65 |
| 1990 | 18,978.49 | 49,773.77 |
| 1991 | 16,598.60 | 48,240.18 |
| 1992 | 13,194.67 | 43,086.04 |
| 1993 | 10,409.13 | 45,609.23 |
| 1994 | 8,198.99 | 46,850.44 |
| 1995 | 6,305.22 | 49,246.86 |
| 1996 | 5,457.54 | 53,866.65 |
| 1997 | 4,973.63 | 57,054.54 |
| 1998 | 4,807.18 | 66,021.84 |
| 1999 | 4,626.40 | 61,885.96 |
| 2000 | 4,574.59 | 70,980.03 |
| 2001 | 4,207.52 | 80,024.50 |
| 2002 | 3,657.47 | 80,566.84 |
| 2003 | 3,635.42 | 82,267.70 |
| 2004 | 3,517.48 | 86,017.77 |
| 2005 | 3,121.75 | 87,911.54 |
| 2006 | 3,112.93 | 89,636.66 |
| 2007 | 3,181.27 | 98,225.86 |
| 2008 | 3,056.71 | 110,522.10 |
| 2009 | 2,776.72 | 114,149.90 |
| 2010 | 2,297.22 | 127,414.00 |
| 2011 | 2,297.22 | 139,481.00 |
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