|
| year | production | consumption |
| 1980 | 943,685.80 | 1,039,640.00 |
| 1981 | 948,963.40 | 1,050,883.00 |
| 1982 | 1,002,237.00 | 1,072,469.00 |
| 1983 | 1,022,426.00 | 1,096,131.00 |
| 1984 | 990,678.00 | 1,122,908.00 |
| 1985 | 1,079,865.00 | 1,206,174.00 |
| 1986 | 1,115,118.00 | 1,224,494.00 |
| 1987 | 1,123,618.00 | 1,250,514.00 |
| 1988 | 1,114,578.00 | 1,224,199.00 |
| 1989 | 1,108,565.00 | 1,246,350.00 |
| 1990 | 1,002,323.00 | 1,150,547.00 |
| 1991 | 1,051,090.00 | 1,220,209.00 |
| 1992 | 1,490,476.00 | 1,632,337.00 |
| 1993 | 1,468,071.00 | 1,626,233.00 |
| 1994 | 1,347,655.00 | 1,524,761.00 |
| 1995 | 1,320,587.00 | 1,493,534.00 |
| 1996 | 1,294,525.00 | 1,485,835.00 |
| 1997 | 1,266,853.00 | 1,430,618.00 |
| 1998 | 1,200,602.00 | 1,384,823.00 |
| 1999 | 1,167,188.00 | 1,326,889.00 |
| 2000 | 1,176,937.00 | 1,384,686.00 |
| 2001 | 1,182,954.00 | 1,358,341.00 |
| 2002 | 1,174,044.00 | 1,357,720.00 |
| 2003 | 1,195,755.00 | 1,395,398.00 |
| 2004 | 1,180,421.00 | 1,374,243.00 |
| 2005 | 1,193,785.00 | 1,359,279.00 |
| 2006 | 1,194,457.00 | 1,390,575.00 |
| 2007 | 1,208,635.00 | 1,408,551.00 |
| 2008 | 1,213,623.00 | 1,380,472.00 |
| 2009 | 1,182,378.00 | 1,284,039.00 |
| 2010 | 1,176,913.00 | 1,306,719.00 |
| 2011 | 1,229,121.00 | 1,355,620.00 |
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