Year	Percent
1950	32.17457
1955	30.92216
1960	29.79545
1965	28.64429
1970	27.48124
1975	27.87101
1980	27.81889
1985	27.73061
1990	28.05474
1995	27.57381
2000	28.80416
2005	29.43064
2010	30.52786
2015	32.42855
2020	34.0252
2025	34.69604
2030	34.08495
2035	32.0441
2040	29.70869
2045	27.55439
2050	25.80303
2055	24.68853
2060	23.33074
2065	21.97923
2070	20.88801
2075	20.20554
2080	19.8236
2085	19.54968
2090	19.32012
2095	19.134
2100	19.03128