Year	Percent
1950	10.34938
1955	11.81459
1960	13.71643
1965	14.15187
1970	15.09643
1975	16.00158
1980	15.57938
1985	15.82436
1990	15.75793
1995	15.88394
2000	13.90798
2005	14.03216
2010	14.2211
2015	14.5617
2020	12.96144
2025	11.73525
2030	11.00727
2035	10.54385
2040	10.12181
2045	9.60259
2050	9.00609
2055	8.38592
2060	7.83969
2065	7.3948
2070	7.00821
2075	6.65768
2080	6.31128
2085	5.9875
2090	5.70463
2095	5.47151
2100	5.29491