Year	Percent
1950	33.08618
1955	29.69755
1960	25.57304
1965	26.86604
1970	29.14272
1975	27.83567
1980	34.29192
1985	36.28241
1990	35.13742
1995	31.20682
2000	29.62171
2005	28.11299
2010	28.78834
2015	27.4772
2020	27.6047
2025	28.93453
2030	30.34164
2035	30.60624
2040	30.04184
2045	29.23863
2050	28.54137
2055	28.1871
2060	28.05187
2065	27.82635
2070	27.37191
2075	26.75167
2080	26.12091
2085	25.60026
2090	25.19981
2095	24.83926
2100	24.43729