Year	Percent
1950	10.27464
1955	11.11979
1960	10.75894
1965	10.94286
1970	10.92725
1975	11.54714
1980	12.74357
1985	12.91328
1990	12.84174
1995	12.16811
2000	11.79699
2005	10.29799
2010	9.22518
2015	9.0784
2020	9.08098
2025	9.07747
2030	8.18458
2035	7.38994
2040	6.73652
2045	6.37118
2050	6.28308
2055	6.29895
2060	6.22168
2065	6.0104
2070	5.75569
2075	5.58432
2080	5.52142
2085	5.52441
2090	5.51503
2095	5.44998
2100	5.33725