Year	Percent
1950	14.57673
1955	13.81855
1960	13.59334
1965	12.94265
1970	12.5794
1975	12.00408
1980	11.12797
1985	10.81563
1990	10.40993
1995	10.88711
2000	11.06334
2005	10.8936
2010	10.84168
2015	11.35739
2020	13.02248
2025	15.3432
2030	17.51416
2035	19.06046
2040	19.77299
2045	20.11676
2050	20.98737
2055	22.44711
2060	23.68014
2065	24.53155
2070	24.84027
2075	24.76651
2080	24.90189
2085	25.15528
2090	25.33598
2095	25.28909
2100	25.06907