|
| year | production | consumption |
| 1980 | 45,526.46 | 48,673.56 |
| 1981 | 57,235.29 | 58,541.53 |
| 1982 | 60,256.64 | 62,438.11 |
| 1983 | 65,468.37 | 68,159.11 |
| 1984 | 71,729.60 | 76,499.30 |
| 1985 | 77,011.88 | 81,621.75 |
| 1986 | 77,001.96 | 81,864.26 |
| 1987 | 78,771.17 | 82,707.52 |
| 1988 | 79,999.15 | 84,509.80 |
| 1989 | 82,225.81 | 85,305.67 |
| 1990 | 83,608.11 | 83,156.16 |
| 1991 | 78,035.93 | 81,067.28 |
| 1992 | | |
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