Year	Percent
1950	14.09291
1955	13.87202
1960	13.61851
1965	13.29443
1970	13.04062
1975	12.98621
1980	13.29884
1985	13.93937
1990	14.81112
1995	15.97614
2000	17.4052
2005	19.03995
2010	20.65422
2015	22.04079
2020	22.94298
2025	23.36818
2030	23.5346
2035	23.47254
2040	23.57141
2045	23.69896
2050	23.90229
2055	24.2598
2060	24.39927
2065	24.498
2070	24.47762
2075	24.28019
2080	24.0898
2085	23.88168
2090	23.63024
2095	23.34919
2100	23.06828