Year	Percent
1950	10.80761
1955	10.93867
1960	11.0128
1965	11.04249
1970	10.95641
1975	11.18173
1980	11.50254
1985	12.06016
1990	12.33788
1995	12.61256
2000	12.37678
2005	12.31994
2010	12.49776
2015	12.57826
2020	12.57138
2025	11.94005
2030	11.44095
2035	10.96161
2040	10.51604
2045	10.04388
2050	9.573
2055	9.10748
2060	8.68084
2065	8.30142
2070	7.93302
2075	7.60839
2080	7.30882
2085	7.043
2090	6.80616
2095	6.60553
2100	6.43469