Year	Percent
1950	11.62457
1955	11.75915
1960	11.50448
1965	11.09741
1970	11.93744
1975	12.77936
1980	13.07394
1985	12.35896
1990	12.69923
1995	12.53458
2000	11.96636
2005	11.21638
2010	10.72385
2015	10.08236
2020	9.06319
2025	8.33157
2030	7.78347
2035	7.22229
2040	6.68418
2045	6.18875
2050	5.78075
2055	5.48443
2060	5.24925
2065	5.05521
2070	4.9001
2075	4.77718
2080	4.69232
2085	4.63106
2090	4.59273
2095	4.5716
2100	4.55731