Year	2010 = 100
1977	35.0903611818616
1978	36.4911740033413
1979	44.5458477279236
1980	47.7326968973747
1981	50.5343225408115
1982	51.6467780429594
1983	53.9379474940334
1984	56.0859188544153
1985	60.9069212405728
1986	64.8210023866348
1987	72.5536992840095
1988	89.2601431980907
1989	102.673031026253
1990	100
1991	97.9952267303103