Year	Percent
1950	15.60676
1955	16.32057
1960	16.25531
1965	15.57114
1970	14.87544
1975	14.51386
1980	14.34914
1985	14.03139
1990	13.47116
1995	13.54484
2000	13.76067
2005	14.37865
2010	15.25366
2015	15.76839
2020	16.94771
2025	18.97154
2030	20.96468
2035	22.85629
2040	24.17905
2045	24.56922
2050	24.94562
2055	25.25725
2060	25.53229
2065	25.78908
2070	25.88222
2075	25.94541
2080	25.90289
2085	25.82996
2090	25.71178
2095	25.56176
2100	25.37432