Year	Percent
1950	16.10277
1955	16.03721
1960	16.04367
1965	15.93328
1970	15.66194
1975	15.11226
1980	14.48737
1985	13.89348
1990	13.29975
1995	13.43642
2000	13.44923
2005	13.34372
2010	13.24458
2015	13.07634
2020	13.28788
2025	13.85935
2030	14.70384
2035	15.68814
2040	16.68081
2045	17.67391
2050	18.65844
2055	19.57133
2060	20.4294
2065	21.21311
2070	21.92076
2075	22.5618
2080	23.11472
2085	23.58292
2090	23.95277
2095	24.24
2100	24.46448