Year	Percent
1950	23.50968
1955	24.12171
1960	23.48424
1965	22.80298
1970	23.70155
1975	24.05128
1980	26.81372
1985	26.54425
1990	24.92723
1995	25.22327
2000	25.74996
2005	26.81672
2010	27.5403
2015	28.10611
2020	27.71896
2025	27.5857
2030	28.60527
2035	28.1903
2040	25.90411
2045	23.81259
2050	22.53263
2055	22.47281
2060	24.51183
2065	25.48504
2070	24.51593
2075	23.39801
2080	22.77133
2085	22.80516
2090	23.36323
2095	23.89976
2100	23.85505