Year	Percent
1950	14.86056
1955	18.71918
1960	16.44722
1965	17.52399
1970	19.3989
1975	18.59902
1980	17.94509
1985	17.63361
1990	17.49899
1995	16.91757
2000	16.61695
2005	15.99372
2010	16.07515
2015	15.75999
2020	14.98293
2025	14.23095
2030	13.62127
2035	13.10899
2040	12.62343
2045	12.13521
2050	11.62789
2055	11.1347
2060	10.65466
2065	10.24139
2070	9.82132
2075	9.4163
2080	9.0061
2085	8.61161
2090	8.22797
2095	7.85798
2100	7.51848