|
| year | production | consumption |
| 1980 | 919,973.40 | 1,002,692.00 |
| 1981 | 940,625.80 | 1,037,670.00 |
| 1982 | 1,001,086.00 | 1,097,722.00 |
| 1983 | 1,060,539.00 | 1,154,110.00 |
| 1984 | 1,173,179.00 | 1,285,737.00 |
| 1985 | 1,224,107.00 | 1,326,635.00 |
| 1986 | 1,265,662.00 | 1,389,522.00 |
| 1987 | 1,305,914.00 | 1,461,453.00 |
| 1988 | 1,392,407.00 | 1,576,096.00 |
| 1989 | 1,461,993.00 | 1,593,991.00 |
| 1990 | 1,497,330.00 | 1,618,150.00 |
| 1991 | 1,532,513.00 | 1,691,564.00 |
| 1992 | 1,712,518.00 | 1,844,409.00 |
| 1993 | 1,745,776.00 | 1,902,155.00 |
| 1994 | 1,828,840.00 | 2,021,301.00 |
| 1995 | 1,950,403.00 | 2,130,295.00 |
| 1996 | 2,000,506.00 | 2,191,432.00 |
| 1997 | 2,043,960.00 | 2,221,474.00 |
| 1998 | 2,055,055.00 | 2,271,491.00 |
| 1999 | 1,968,362.00 | 2,236,606.00 |
| 2000 | 2,059,450.00 | 2,336,447.00 |
| 2001 | 2,196,287.00 | 2,422,783.00 |
| 2002 | 2,286,701.00 | 2,532,530.00 |
| 2003 | 2,559,707.00 | 2,794,894.00 |
| 2004 | 2,784,060.00 | 3,086,649.00 |
| 2005 | 3,172,457.00 | 3,467,576.00 |
| 2006 | 3,385,435.00 | 3,746,318.00 |
| 2007 | 3,616,686.00 | 4,004,728.00 |
| 2008 | 3,846,850.00 | 4,245,275.00 |
| 2009 | 4,168,703.00 | 4,645,837.00 |
| 2010 | 4,397,188.00 | 4,847,886.00 |
| 2011 | 4,784,587.00 | 5,244,301.00 |
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