Year	Percent
1950	11.40467
1955	10.93368
1960	10.459
1965	11.74728
1970	12.50349
1975	12.62309
1980	12.45562
1985	12.28308
1990	12.49649
1995	13.13939
2000	13.20638
2005	12.66542
2010	12.16275
2015	11.83915
2020	11.78905
2025	11.74526
2030	11.29291
2035	10.79611
2040	10.35872
2045	10.01933
2050	9.73935
2055	9.46328
2060	9.16557
2065	8.8391
2070	8.54514
2075	8.28044
2080	8.06277
2085	7.82799
2090	7.59039
2095	7.36026
2100	7.14201