Year	Percent
1950	26.4917
1955	26.73296
1960	26.36704
1965	26.01698
1970	25.93642
1975	26.24359
1980	26.10731
1985	26.28136
1990	27.17256
1995	28.04257
2000	28.27871
2005	28.04114
2010	28.47385
2015	30.24669
2020	32.17627
2025	32.92005
2030	32.71077
2035	31.23851
2040	29.68015
2045	28.98971
2050	28.24405
2055	27.18624
2060	25.71471
2065	24.27699
2070	23.15439
2075	22.38719
2080	21.87175
2085	21.44572
2090	21.0174
2095	20.61005
2100	20.30132