Year	Percent
1950	32.63299
1955	29.40308
1960	32.63665
1965	29.5786
1970	26.66174
1975	27.87999
1980	26.33326
1985	27.45797
1990	27.27023
1995	26.54033
2000	26.48699
2005	27.32898
2010	28.27164
2015	27.49377
2020	25.04819
2025	21.88848
2030	19.79599
2035	19.66503
2040	20.68306
2045	21.72299
2050	21.30079
2055	20.49455
2060	20.03355
2065	20.24765
2070	20.98507
2075	21.72958
2080	21.97107
2085	21.65812
2090	21.19215
2095	20.98027
2100	21.09791