Year	Percent
1950	23.49555
1955	23.612
1960	21.13504
1965	20.50529
1970	21.39908
1975	23.90292
1980	26.54452
1985	26.13422
1990	26.30437
1995	27.46959
2000	27.44487
2005	29.68975
2010	29.16668
2015	28.43047
2020	28.29405
2025	28.43865
2030	28.95289
2035	28.26026
2040	27.57505
2045	26.06886
2050	25.43283
2055	25.40053
2060	24.83095
2065	24.80302
2070	24.01098
2075	23.35356
2080	23.10809
2085	23.17963
2090	23.29913
2095	23.30684
2100	23.13057