Year	Percent
1950	26.99822
1955	26.62606
1960	26.29595
1965	25.1964
1970	24.56146
1975	24.92702
1980	25.56634
1985	26.39099
1990	27.32661
1995	27.90441
2000	28.99657
2005	30.42851
2010	31.88611
2015	33.51134
2020	34.45015
2025	34.65867
2030	33.95558
2035	32.36403
2040	30.76222
2045	29.2816
2050	28.15437
2055	27.31627
2060	26.31375
2065	25.24948
2070	24.26292
2075	23.46642
2080	22.86007
2085	22.40114
2090	22.01979
2095	21.68238
2100	21.38432