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Loading...
| year | production | consumption |
| 1980 | 18.00 | 16.00 |
| 1981 | 20.00 | 18.00 |
| 1982 | 20.00 | 18.00 |
| 1983 | 22.00 | 20.00 |
| 1984 | 29.00 | 25.00 |
| 1985 | 32.00 | 25.00 |
| 1986 | 33.00 | 30.00 |
| 1987 | 37.00 | 31.00 |
| 1988 | 35.00 | 30.00 |
| 1989 | 38.00 | 32.00 |
| 1990 | 41.00 | 37.00 |
| 1991 | 43.00 | 38.00 |
| 1992 | 43.00 | 39.00 |
| 1993 | 48.00 | 43.00 |
| 1994 | 50.00 | 45.00 |
| 1995 | 53.00 | 47.00 |
| 1996 | 52.00 | 48.00 |
| 1997 | 56.00 | 52.00 |
| 1998 | 60.00 | 55.00 |
| 1999 | 65.00 | 60.00 |
| 2000 | 74.00 | 63.00 |
| 2001 | 79.00 | 68.00 |
| 2002 | 84.00 | 72.00 |
| 2003 | 90.00 | 78.00 |
| 2004 | 96.00 | 83.00 |
| 2005 | 103.00 | 89.00 |
| 2006 | 109.00 | 96.00 |
| 2007 | 118.00 | 105.00 |
| 2008 | 124.00 | 110.00 |
| 2009 | 131.00 | 117.00 |
| 2010 | 139.00 | 122.00 |
| 2011 | 149.00 | 134.00 |
| 2012 | 155.00 | 137.00 |
| 2013 | 159.00 | 140.00 |
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