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| 1978 | 124.96 | 7.12 | 5.7% | -5.87 | -4.7% | 1.25 | 1.0% | 6.32 | 5.06% |
| 1979 | 119.09 | 8.10 | 6.8% | 5.78 | 4.9% | 13.88 | 11.7% | 6.57 | 5.52% |
| 1980 | 124.87 | 8.72 | 7.0% | 10.23 | 8.2% | 18.95 | 15.2% | 6.77 | 5.42% |
| 1981 | 135.10 | 9.52 | 7.0% | 5.40 | 4.0% | 14.92 | 11.0% | 6.97 | 5.16% |
| 1982 | 140.50 | 12.34 | 8.8% | -12.46 | -8.9% | -0.12 | -0.1% | 7.18 | 5.11% |
| 1983 | 128.04 | 10.83 | 8.5% | 43.01 | 33.6% | 53.84 | 42.0% | 7.40 | 5.78% |
| 1984 | 171.05 | 10.71 | 6.3% | -16.92 | -9.9% | -6.21 | -3.6% | 7.40 | 4.33% |
| 1985 | 154.13 | 11.52 | 7.5% | 28.34 | 18.4% | 39.86 | 25.9% | 7.58 | 4.92% |
| 1986 | 182.47 | 12.53 | 6.9% | 42.28 | 23.2% | 54.81 | 30.0% | 7.86 | 4.31% |
| 1987 | 224.75 | 11.16 | 5.0% | 32.03 | 14.3% | 43.19 | 19.2% | 8.09 | 3.60% |
| 1988 | 256.78 | 10.41 | 4.1% | 3.57 | 1.4% | 14.0 | 5.4% | 8.49 | 3.31% |
| 1989 | 260.35 | 13.94 | 5.4% | 18.27 | 7.0% | 32.21 | 12.4% | 10.16 | 3.90% |
| 1990 | 278.62 | 14.57 | 5.2% | 6.04 | 2.2% | 20.61 | 7.4% | 10.65 | 3.82% |
| 1991 | 284.66 | 12.75 | 4.5% | -9.72 | -3.4% | 3.03 | 1.1% | 11.96 | 4.20% |
| 1992 | 274.94 | 11.87 | 4.3% | 20.26 | 7.4% | 32.13 | 11.7% | 12.44 | 4.52% |
| 1993 | 295.20 | 11.70 | 4.0% | 36.68 | 12.4% | 48.38 | 16.4% | 14.08 | 4.77% |
| 1994 | 331.88 | 13.19 | 4.0% | 19.05 | 5.7% | 32.24 | 9.7% | 15.01 | 4.52% |
| 1995 | 350.93 | 11.90 | 3.4% | 45.87 | 13.1% | 57.77 | 16.5% | 16.07 | 4.58% |
| 1996 | 396.80 | 15.23 | 3.8% | 86.03 | 21.7% | 101.3 | 25.5% | 17.20 | 4.33% |
| 1997 | 482.83 | 14.60 | 3.0% | 106.53 | 22.1% | 121.13 | 25.1% | 19.84 (5) | 4.11% |
| 1998 | 589.36 | * | * | * | * | * | * | 21.90 | 3.72% |
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| 20 YEAR | 8.1% | 6.4% |
| 10 YEAR | 8.7% | 9.9% |
| 5 YEAR | 14.8% | 9.2% |
| 1 YEAR | 22.1% | 10.4% |
