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Loading...
| year | production | consumption |
| 1980 | 32.00 | 27.00 |
| 1981 | 36.00 | 32.00 |
| 1982 | 38.00 | 32.00 |
| 1983 | 42.00 | 35.00 |
| 1984 | 43.00 | 37.00 |
| 1985 | 46.00 | 39.00 |
| 1986 | 48.00 | 40.00 |
| 1987 | 52.00 | 43.00 |
| 1988 | 56.00 | 47.00 |
| 1989 | 56.00 | 46.00 |
| 1990 | 58.00 | 47.00 |
| 1991 | 62.00 | 49.00 |
| 1992 | 66.00 | 53.00 |
| 1993 | 68.00 | 55.00 |
| 1994 | 69.00 | 55.00 |
| 1995 | 72.00 | 56.00 |
| 1996 | 74.00 | 58.00 |
| 1997 | 76.00 | 60.00 |
| 1998 | 79.00 | 61.00 |
| 1999 | 79.00 | 60.00 |
| 2000 | 83.00 | 63.00 |
| 2001 | 88.00 | 65.00 |
| 2002 | 87.00 | 64.00 |
| 2003 | 89.00 | 65.00 |
| 2004 | 96.00 | 70.00 |
| 2005 | 101.00 | 72.00 |
| 2006 | 108.00 | 78.00 |
| 2007 | 112.00 | 80.00 |
| 2008 | 116.00 | 84.00 |
| 2009 | 117.00 | 84.00 |
| 2010 | 111.00 | 88.00 |
| 2011 | 115.00 | 91.00 |
| 2012 | 118.00 | 94.00 |
| 2013 | 120.00 | 95.00 |
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