Year	Percent
1950	12.44187
1955	13.52865
1960	11.79966
1965	10.43408
1970	10.5085
1975	10.95947
1980	13.29546
1985	13.8614
1990	14.8652
1995	16.52586
2000	20.43803
2005	19.43269
2010	21.3423
2015	28.9161
2020	30.21052
2025	30.78098
2030	29.02117
2035	27.17518
2040	26.73976
2045	26.05819
2050	26.32616
2055	26.95146
2060	27.03849
2065	27.16631
2070	26.87145
2075	26.27803
2080	25.66635
2085	25.53364
2090	25.60678
2095	25.57418
2100	25.34106