Year	Percent
1950	23.17822
1955	23.96744
1960	23.03292
1965	22.55447
1970	23.53136
1975	24.05534
1980	26.14315
1985	25.35758
1990	24.5125
1995	25.57047
2000	26.02765
2005	27.26814
2010	27.05694
2015	27.10297
2020	26.80355
2025	27.06881
2030	28.46808
2035	27.57434
2040	25.36312
2045	23.28224
2050	21.91436
2055	21.98133
2060	23.57907
2065	24.35232
2070	23.36839
2075	22.61266
2080	22.09105
2085	22.11691
2090	22.61321
2095	23.01859
2100	22.89968