Year	Percent
1950	10.25386
1955	9.30427
1960	8.56131
1965	9.28852
1970	10.69268
1975	11.95976
1980	12.41826
1985	11.79561
1990	11.26024
1995	10.71251
2000	11.00542
2005	10.537
2010	10.71246
2015	10.66095
2020	9.92333
2025	8.60842
2030	8.29639
2035	8.19552
2040	7.93895
2045	7.50386
2050	7.03489
2055	6.65505
2060	6.39726
2065	6.21718
2070	6.04333
2075	5.86495
2080	5.6869
2085	5.5478
2090	5.45386
2095	5.38588
2100	5.33218