Year	Percent
1950	29.73455
1955	28.92048
1960	29.21208
1965	28.17266
1970	27.23322
1975	27.65168
1980	28.41458
1985	32.10775
1990	35.3454
1995	36.90118
2000	35.505
2005	31.46239
2010	28.6395
2015	25.7272
2020	25.27772
2025	24.38569
2030	22.21928
2035	21.29052
2040	20.71083
2045	20.66329
2050	20.79723
2055	20.45698
2060	20.17904
2065	20.05107
2070	20.11491
2075	20.26701
2080	20.34561
2085	20.2948
2090	20.14956
2095	19.99301
2100	19.91256