Year	Percent
1950	28.89605
1955	28.94232
1960	28.68132
1965	28.28231
1970	27.51881
1975	26.48069
1980	26.31009
1985	26.87474
1990	26.64825
1995	27.61176
2000	28.22325
2005	28.7084
2010	28.84379
2015	27.29522
2020	28.38026
2025	30.46146
2030	31.98656
2035	32.70401
2040	32.36733
2045	31.96533
2050	31.87136
2055	31.8993
2060	31.90108
2065	31.45479
2070	30.70095
2075	29.91576
2080	29.28251
2085	28.75449
2090	28.21529
2095	27.59648
2100	26.91823