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| year | production | consumption |
| 1980 | 45,526.00 | 48,674.00 |
| 1981 | 57,235.00 | 58,542.00 |
| 1982 | 60,257.00 | 62,438.00 |
| 1983 | 65,468.00 | 68,159.00 |
| 1984 | 71,730.00 | 76,499.00 |
| 1985 | 77,012.00 | 81,622.00 |
| 1986 | 77,002.00 | 81,864.00 |
| 1987 | 78,771.00 | 82,708.00 |
| 1988 | 79,999.00 | 84,510.00 |
| 1989 | 82,226.00 | 85,306.00 |
| 1990 | 83,608.00 | 83,156.00 |
| 1991 | 78,036.00 | 81,067.00 |
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