|
| year | production | consumption |
| 1984 | 755.70 | 787.66 |
| 1985 | 765.48 | 798.91 |
| 1986 | 784.28 | 835.04 |
| 1987 | 787.18 | 885.15 |
| 1988 | 832.97 | 975.81 |
| 1989 | 904.20 | 1,045.71 |
| 1990 | 1,001.42 | 1,112.33 |
| 1991 | 1,114.12 | 1,167.46 |
| 1992 | 1,157.42 | 1,186.11 |
| 1993 | 1,191.10 | 1,200.90 |
| 1994 | 1,243.51 | 1,245.42 |
| 1995 | 1,280.26 | 1,271.11 |
| 1996 | 1,296.65 | 1,298.54 |
| 1997 | 1,308.80 | 1,283.75 |
| 1998 | 1,255.10 | 1,245.86 |
| 1999 | 1,244.82 | 1,255.34 |
| 2000 | 1,223.62 | 1,241.32 |
| 2001 | 1,211.57 | 1,241.56 |
| 2002 | 1,182.91 | 1,207.43 |
| 2003 | 1,175.80 | 1,186.35 |
| 2004 | 1,172.08 | 1,166.94 |
| 2005 | 1,182.60 | 1,149.76 |
| 2006 | 1,130.23 | 1,081.25 |
| 2007 | 1,119.39 | 1,004.57 |
| 2008 | 1,135.29 | 924.54 |
| 2009 | 1,035.90 | 842.79 |
| 2010 | 1,020.20 | 839.80 |
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