Year	Percent
1950	11.95425
1955	11.91604
1960	11.94756
1965	12.02315
1970	13.41712
1975	12.89311
1980	12.58907
1985	12.84904
1990	13.15758
1995	13.42811
2000	13.67301
2005	14.53451
2010	15.28299
2015	15.87454
2020	16.93685
2025	18.27513
2030	19.67541
2035	20.14976
2040	21.06804
2045	21.21995
2050	22.00746
2055	23.01411
2060	23.44292
2065	23.97036
2070	23.92288
2075	24.04893
2080	24.17216
2085	24.32028
2090	24.45876
2095	24.53412
2100	24.53486