Year	Percent
1950	29.61357
1955	29.38621
1960	29.00749
1965	29.41176
1970	30.06956
1975	29.80928
1980	29.12786
1985	28.60006
1990	29.43879
1995	32.87843
2000	32.47219
2005	31.361
2010	29.3203
2015	29.06273
2020	29.58792
2025	30.16735
2030	29.56561
2035	28.40302
2040	27.63774
2045	27.14815
2050	26.81917
2055	26.23574
2060	25.57442
2065	24.9226
2070	24.33939
2075	23.87917
2080	23.54407
2085	23.26864
2090	22.98787
2095	22.68649
2100	22.3923