|
| year | production | consumption |
| 1984 | 7,311.07 | 7,588.19 |
| 1985 | 7,369.56 | 7,739.13 |
| 1986 | 7,703.20 | 7,955.46 |
| 1987 | 7,823.04 | 8,146.27 |
| 1988 | 7,969.97 | 8,296.56 |
| 1989 | 7,996.79 | 8,345.67 |
| 1990 | 7,986.08 | 8,287.25 |
| 1991 | 7,988.66 | 8,265.86 |
| 1992 | 8,051.25 | 8,341.83 |
| 1993 | 8,384.07 | 8,563.23 |
| 1994 | 8,360.09 | 8,703.08 |
| 1995 | 8,640.85 | 8,869.46 |
| 1996 | 8,716.53 | 8,978.03 |
| 1997 | 8,907.71 | 9,128.96 |
| 1998 | 9,109.36 | 9,416.75 |
| 1999 | 9,169.67 | 9,610.13 |
| 2000 | 9,260.75 | 9,664.07 |
| 2001 | 9,420.19 | 9,829.31 |
| 2002 | 9,629.51 | 10,093.46 |
| 2003 | 9,703.46 | 10,216.90 |
| 2004 | 9,935.09 | 10,433.53 |
| 2005 | 9,507.67 | 10,520.81 |
| 2006 | 9,520.60 | 10,660.77 |
| 2007 | 9,555.30 | 10,756.71 |
| 2008 | 9,679.58 | 10,483.39 |
| 2009 | 9,957.84 | 10,502.55 |
| 2010 | 10,185.59 | 10,532.99 |
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