Year	Percent
1950	14.06607
1955	14.18839
1960	13.16806
1965	12.87151
1970	13.25271
1975	13.29288
1980	13.31948
1985	11.97125
1990	12.67929
1995	13.00883
2000	14.14991
2005	16.90254
2010	17.91798
2015	18.76281
2020	19.70304
2025	21.49012
2030	25.84893
2035	28.15019
2040	28.78577
2045	27.14562
2050	24.98243
2055	24.78672
2060	25.44261
2065	26.25432
2070	25.73574
2075	24.35135
2080	23.0882
2085	22.63707
2090	22.86963
2095	23.09949
2100	22.76324