Year	Percent
1950	26.79575
1955	26.75444
1960	26.75362
1965	26.76845
1970	27.8943
1975	28.24023
1980	28.67402
1985	29.29713
1990	29.79333
1995	29.90565
2000	29.81818
2005	30.41452
2010	31.45436
2015	31.58673
2020	31.73033
2025	31.03345
2030	30.53236
2035	30.34157
2040	30.04648
2045	29.88838
2050	29.15512
2055	28.68042
2060	28.20971
2065	27.78684
2070	27.36802
2075	26.90509
2080	26.4175
2085	25.90399
2090	25.38852
2095	24.88268
2100	24.38315