Year	Percent
1950	28.03131
1955	28.53112
1960	28.87427
1965	28.0145
1970	27.19582
1975	27.57109
1980	29.09748
1985	31.7617
1990	34.3236
1995	35.04061
2000	34.58205
2005	33.56705
2010	31.20138
2015	28.39655
2020	27.09923
2025	26.32274
2030	25.79409
2035	24.54559
2040	22.8558
2045	21.59094
2050	20.72752
2055	20.22238
2060	20.20016
2065	20.29687
2070	20.23041
2075	20.03939
2080	19.89815
2085	19.89237
2090	20.02047
2095	20.20904
2100	20.3346