Year	Percent
1971	1.00163
1972	0.99482
1973	1.00067
1977	1.00102
1982	1.00965
1983	1.02534
1984	1.01672
1985	1.0173
1987	1.01429
1988	1.0122
1989	1.01592
1990	1.02665
1991	1.01396
1992	1.00916
1993	1.01185
2004	1.01068