Year	Percent
1950	14.83535
1955	15.64335
1960	16.27152
1965	15.08158
1970	15.19561
1975	15.42064
1980	15.89756
1985	16.84488
1990	17.80786
1995	20.15147
2000	22.73501
2005	25.56514
2010	28.62606
2015	29.04538
2020	26.06034
2025	21.35928
2030	18.1097
2035	17.91045
2040	20.84069
2045	24.37467
2050	26.95894
2055	26.77443
2060	24.82238
2065	23.25025
2070	22.78737
2075	22.84569
2080	23.30619
2085	23.27612
2090	22.58812
2095	21.78205
2100	21.42474