Year Observed Modeled Trend Observed Modeled Trend Observed Modeled Trend 1975 4.91 4.95 2.94 3.03 26.54% 25.13% 1976 5.02 4.99 3.10 3.08 23.65% 25.48% 1977 5.06 5.03 3.13 3.13 24.30% 25.84%
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