Year	Percent
1950	9.98537
1955	9.84834
1960	9.69184
1965	9.54674
1970	9.82456
1975	9.95359
1980	10.20334
1985	10.49738
1990	10.8842
1995	11.09922
2000	10.73599
2005	10.20384
2010	9.68008
2015	9.86368
2020	10.34096
2025	10.93158
2030	10.88361
2035	10.21196
2040	9.91895
2045	9.89552
2050	9.90682
2055	9.7482
2060	9.43912
2065	9.13405
2070	8.90112
2075	8.71046
2080	8.52933
2085	8.30162
2090	8.05162
2095	7.82057
2100	7.60729