Year	Percent
1950	28.68872
1955	29.99163
1960	32.09863
1965	30.64633
1970	30.20466
1975	29.48866
1980	29.36858
1985	30.76612
1990	30.01037
1995	27.92532
2000	27.40868
2005	27.01166
2010	26.79868
2015	25.88583
2020	24.75851
2025	23.07586
2030	22.27259
2035	22.11644
2040	21.52191
2045	21.4362
2050	20.69077
2055	20.09709
2060	19.90927
2065	20.0385
2070	20.24542
2075	20.37247
2080	20.3327
2085	20.16997
2090	20.05382
2095	20.0928
2100	20.22747