Year	2010 = 100
1981	17.1112870820216
1982	35.6339400726141
1983	44.9690461999524
1984	48.410974179508
1985	53.4442711436864
1986	58.2555683193865
1987	64.4388782612039
1988	75.9476597196855
1989	87.0187501201623
1990	100
1991	128.09363764828
1992	151.369609520697
1993	161.061297175706