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Loading...
| year | production | consumption |
| 1980 | 13.00 | 11.00 |
| 1981 | 15.00 | 13.00 |
| 1982 | 18.00 | 15.00 |
| 1983 | 18.00 | 16.00 |
| 1984 | 20.00 | 17.00 |
| 1985 | 26.00 | 23.00 |
| 1986 | 30.00 | 27.00 |
| 1987 | 32.00 | 29.00 |
| 1988 | 37.00 | 32.00 |
| 1989 | 37.00 | 33.00 |
| 1990 | 43.00 | 38.00 |
| 1991 | 46.00 | 41.00 |
| 1992 | 49.00 | 44.00 |
| 1993 | 52.00 | 48.00 |
| 1994 | 58.00 | 51.00 |
| 1995 | 57.00 | 50.00 |
| 1996 | 64.00 | 57.00 |
| 1997 | 73.00 | 64.00 |
| 1998 | 75.00 | 66.00 |
| 1999 | 81.00 | 71.00 |
| 2000 | 89.00 | 78.00 |
| 2001 | 96.00 | 83.00 |
| 2002 | 103.00 | 85.00 |
| 2003 | 108.00 | 89.00 |
| 2004 | 114.00 | 100.00 |
| 2005 | 121.00 | 107.00 |
| 2006 | 127.00 | 112.00 |
| 2007 | 136.00 | 121.00 |
| 2008 | 142.00 | 127.00 |
| 2009 | 149.00 | 133.00 |
| 2010 | 161.00 | 145.00 |
| 2011 | 173.00 | 157.00 |
| 2012 | 185.00 | 167.00 |
| 2013 | 206.00 | 185.00 |
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