Year	Percent
1950	26.96855
1955	27.24597
1960	27.30108
1965	27.9184
1970	28.17246
1975	27.56653
1980	27.0421
1985	26.48001
1990	26.37368
1995	26.50107
2000	26.2627
2005	25.82314
2010	25.1304
2015	24.75602
2020	24.91965
2025	25.45671
2030	26.31521
2035	27.15318
2040	27.87199
2045	28.55729
2050	29.23372
2055	29.90405
2060	30.5073
2065	30.97665
2070	31.29148
2075	31.42709
2080	31.41057
2085	31.247
2090	30.94202
2095	30.55357
2100	30.07273