|
| year | production | change |
| 1980 | 1.76 | NA |
| 1981 | 1.85 | 5.11 % |
| 1982 | 1.96 | 5.95 % |
| 1983 | 2.12 | 8.16 % |
| 1984 | 2.27 | 7.08 % |
| 1985 | 2.10 | -7.49 % |
| 1986 | 2.12 | 0.95 % |
| 1987 | 2.15 | 1.42 % |
| 1988 | 2.23 | 3.72 % |
| 1989 | 2.36 | 5.83 % |
| 1990 | 2.49 | 5.51 % |
| 1991 | 2.45 | -1.61 % |
| 1992 | 2.51 | 2.61 % |
| 1993 | 2.10 | -16.35 % |
| 1994 | 2.43 | 15.55 % |
| 1995 | 2.47 | 1.65 % |
| 1996 | 2.65 | 7.29 % |
| 1997 | 2.85 | 7.55 % |
| 1998 | 2.81 | -1.40 % |
| 1999 | 3.28 | 16.73 % |
| 2000 | 3.77 | 14.97 % |
| 2001 | 4.05 | 7.40 % |
| 2002 | 4.33 | 6.91 % |
| 2003 | 4.55 | 5.08 % |
| 2004 | 4.48 | -1.54 % |
| 2005 | 4.43 | -1.12 % |
| 2006 | 4.66 | 5.19 % |
|
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