Year	Percent
1950	22.76433
1955	23.23873
1960	21.3028
1965	21.68385
1970	22.11648
1975	22.51802
1980	23.4287
1985	21.58838
1990	22.20656
1995	24.1245
2000	26.62235
2005	28.38247
2010	27.54975
2015	26.47105
2020	26.375
2025	28.35036
2030	29.91442
2035	29.9615
2040	27.92597
2045	24.80501
2050	23.30781
2055	22.47107
2060	22.46104
2065	22.6776
2070	21.84557
2075	21.0372
2080	20.75355
2085	21.00651
2090	21.43675
2095	21.73872
2100	21.67137