Year	Percent
1950	19.22883
1955	19.39695
1960	16.84228
1965	14.9172
1970	14.62615
1975	15.09504
1980	15.29037
1985	12.94154
1990	11.26249
1995	11.1125
2000	11.84167
2005	14.71427
2010	16.6943
2015	17.38083
2020	17.45298
2025	18.21593
2030	20.10936
2035	21.48298
2040	22.25037
2045	21.77976
2050	21.33625
2055	22.03466
2060	23.03452
2065	24.13797
2070	24.32367
2075	23.92332
2080	23.81935
2085	24.15423
2090	24.61726
2095	24.78416
2100	24.53969