Year	Percent
1950	12.93954
1955	14.06038
1960	15.14283
1965	17.07701
1970	16.73836
1975	16.33836
1980	17.57088
1985	18.82271
1990	20.55387
1995	22.26504
2000	23.72203
2005	24.16015
2010	24.58271
2015	25.20184
2020	25.88046
2025	26.38956
2030	26.84611
2035	27.58009
2040	27.88538
2045	27.7679
2050	27.22164
2055	25.67831
2060	24.12098
2065	22.91439
2070	22.07698
2075	21.92328
2080	21.80188
2085	21.63131
2090	21.38208
2095	21.20409
2100	21.17748