Year	Percent
1950	12.1298
1955	11.22892
1960	10.18435
1965	10.97943
1970	12.16785
1975	12.43938
1980	12.48172
1985	12.16244
1990	11.78856
1995	11.37047
2000	10.35913
2005	10.00191
2010	9.35696
2015	9.17128
2020	8.65839
2025	8.56576
2030	7.9913
2035	7.53189
2040	7.19863
2045	6.97437
2050	6.78801
2055	6.58773
2060	6.38373
2065	6.19005
2070	6.03363
2075	5.91536
2080	5.82908
2085	5.73805
2090	5.64943
2095	5.56594
2100	5.49211