Year	Percent
1950	11.31555
1955	11.70249
1960	11.61057
1965	12.99894
1970	13.01945
1975	12.74959
1980	13.01464
1985	13.99646
1990	12.68458
1995	11.5275
2000	10.95499
2005	10.53176
2010	10.08093
2015	9.25677
2020	8.48744
2025	8.12863
2030	7.59351
2035	7.05493
2040	6.54896
2045	6.13248
2050	5.80326
2055	5.55566
2060	5.34976
2065	5.17752
2070	5.01504
2075	4.89802
2080	4.80753
2085	4.75094
2090	4.71512
2095	4.68471
2100	4.66196