Year	Percent
1950	13.6068
1955	13.6963
1960	13.54916
1965	13.29196
1970	13.02294
1975	12.76325
1980	12.21206
1985	11.6207
1990	11.13537
1995	11.21619
2000	11.84865
2005	12.65628
2010	13.55443
2015	14.3984
2020	15.22845
2025	16.06792
2030	16.85639
2035	17.49644
2040	18.02821
2045	18.54539
2050	19.16326
2055	19.95587
2060	20.72016
2065	21.3908
2070	21.91274
2075	22.28755
2080	22.66192
2085	23.05125
2090	23.44873
2095	23.81671
2100	24.14229