Year	Percent
1950	17.15747
1955	17.97533
1960	16.95855
1965	15.72621
1970	15.01892
1975	14.43935
1980	13.47207
1985	13.23377
1990	13.78959
1995	14.8007
2000	16.62437
2005	19.31414
2010	20.97629
2015	22.05719
2020	22.65004
2025	23.3803
2030	24.67714
2035	26.24069
2040	27.80224
2045	27.59716
2050	26.26951
2055	24.19265
2060	23.30252
2065	23.44021
2070	23.66764
2075	23.9873
2080	22.66416
2085	21.55896
2090	21.00725
2095	20.99367
2100	21.193