Year	Percent
1950	10.53045
1955	9.56139
1960	9.80286
1965	11.74142
1970	12.04588
1975	12.17556
1980	12.34772
1985	12.58109
1990	12.79612
1995	12.49154
2000	12.34573
2005	12.61561
2010	12.95113
2015	12.60191
2020	12.13017
2025	11.65337
2030	11.49815
2035	11.31448
2040	10.99759
2045	10.58294
2050	10.18525
2055	9.84977
2060	9.5481
2065	9.24869
2070	8.92428
2075	8.60671
2080	8.30665
2085	8.00854
2090	7.73491
2095	7.46076
2100	7.1881