Year	Percent
1950	27.36943
1955	28.67303
1960	29.40052
1965	29.71341
1970	29.38677
1975	27.81608
1980	26.96726
1985	26.72779
1990	26.77395
1995	27.33704
2000	27.46424
2005	27.43884
2010	27.87968
2015	28.69504
2020	29.64834
2025	30.43017
2030	30.92856
2035	31.23134
2040	31.4486
2045	31.67736
2050	31.74459
2055	31.65059
2060	31.39658
2065	31.06537
2070	30.7255
2075	30.39143
2080	30.03311
2085	29.6265
2090	29.18006
2095	28.71512
2100	28.24275