Year	Percent
1950	16.47426
1955	16.98077
1960	15.67684
1965	16.02845
1970	17.40223
1975	19.69055
1980	22.73168
1985	22.1096
1990	23.01015
1995	24.66435
2000	24.907
2005	28.07504
2010	28.75702
2015	28.50886
2020	28.03041
2025	27.12103
2030	27.34328
2035	27.37375
2040	27.64642
2045	26.38199
2050	24.95394
2055	23.39803
2060	21.88375
2065	22.2281
2070	22.54131
2075	22.7962
2080	22.65239
2085	22.17324
2090	21.78678
2095	21.79897
2100	22.07112