Year	Percent
1950	16.25326
1955	17.76244
1960	18.57811
1965	17.77671
1970	16.96119
1975	16.52948
1980	17.36034
1985	18.3087
1990	19.09027
1995	20.82705
2000	22.16918
2005	26.43825
2010	30.49535
2015	32.60945
2020	32.01618
2025	28.68227
2030	26.46473
2035	24.14962
2040	24.22036
2045	23.83538
2050	22.13655
2055	21.73194
2060	21.64887
2065	22.06938
2070	22.55268
2075	22.29966
2080	21.9092
2085	21.61675
2090	21.57633
2095	21.65562
2100	21.68566