Year	Percent
1950	17.20446
1955	18.79326
1960	18.75042
1965	18.77576
1970	18.65896
1975	18.85335
1980	19.24949
1985	19.22896
1990	18.32533
1995	17.56892
2000	16.9173
2005	16.62096
2010	16.8371
2015	16.64413
2020	15.55651
2025	14.58433
2030	13.83676
2035	13.27484
2040	12.76819
2045	12.21362
2050	11.6223
2055	11.02339
2060	10.47665
2065	10.0074
2070	9.59014
2075	9.17786
2080	8.77351
2085	8.37883
2090	7.98347
2095	7.63257
2100	7.30434