Year	Percent
1950	18.93457
1955	20.20199
1960	18.70305
1965	18.7139
1970	19.72922
1975	20.05516
1980	21.96668
1985	20.56094
1990	19.86975
1995	21.6283
2000	23.75865
2005	26.12002
2010	27.21009
2015	26.23541
2020	26.66419
2025	28.67085
2030	34.25881
2035	37.09301
2040	36.50528
2045	33.21381
2050	28.58359
2055	26.76567
2060	26.84409
2065	27.44426
2070	27.00379
2075	25.67817
2080	24.87521
2085	24.73004
2090	24.94642
2095	25.19208
2100	25.09991