Year	Percent
1950	21.81739
1955	21.3886
1960	21.81981
1965	22.77976
1970	23.04452
1975	23.37662
1980	24.12323
1985	24.79024
1990	26.23797
1995	27.62596
2000	28.74339
2005	30.94202
2010	31.19054
2015	29.74389
2020	29.34355
2025	29.68112
2030	30.9014
2035	31.80124
2040	31.47067
2045	30.60237
2050	29.38033
2055	28.75235
2060	28.42321
2065	28.03292
2070	27.39033
2075	26.52959
2080	25.60347
2085	24.72114
2090	23.94554
2095	23.23762
2100	22.56219