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Loading...
| year | production | consumption |
| 1980 | 42.00 | 39.00 |
| 1981 | 41.00 | 39.00 |
| 1982 | 43.00 | 40.00 |
| 1983 | 47.00 | 44.00 |
| 1984 | 51.00 | 48.00 |
| 1985 | 51.00 | 48.00 |
| 1986 | 57.00 | 54.00 |
| 1987 | 63.00 | 60.00 |
| 1988 | 70.00 | 66.00 |
| 1989 | 78.00 | 73.00 |
| 1990 | 81.00 | 76.00 |
| 1991 | 89.00 | 83.00 |
| 1992 | 95.00 | 89.00 |
| 1993 | 103.00 | 97.00 |
| 1994 | 110.00 | 104.00 |
| 1995 | 109.00 | 102.00 |
| 1996 | 116.00 | 108.00 |
| 1997 | 123.00 | 116.00 |
| 1998 | 150.00 | 141.00 |
| 1999 | 157.00 | 149.00 |
| 2000 | 172.00 | 163.00 |
| 2001 | 176.00 | 168.00 |
| 2002 | 186.00 | 177.00 |
| 2003 | 196.00 | 187.00 |
| 2004 | 201.00 | 192.00 |
| 2005 | 210.00 | 201.00 |
| 2006 | 218.00 | 208.00 |
| 2007 | 225.00 | 216.00 |
| 2008 | 220.00 | 212.00 |
| 2009 | 212.00 | 202.00 |
| 2010 | 228.00 | 219.00 |
| 2011 | 234.00 | 223.00 |
| 2012 | 232.00 | 222.00 |
| 2013 | 233.00 | 226.00 |
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