1981 | 1985 | 1991 | 1994 | |
per day | 205,000 | 221,000 | 260,000 | 245,500 |
per week | 1,400,000 | 1,550,000 | 1,800,000 | 1,723,000 |
per year | 75,000,000 | 81,000,000 | 95,000,000 | 89,600,000 |
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