Year	Percent
1950	13.32252
1955	14.20289
1960	13.20826
1965	13.37744
1970	14.12575
1975	15.63959
1980	15.5389
1985	16.54702
1990	16.92381
1995	16.69243
2000	16.79587
2005	14.95004
2010	13.97874
2015	13.47286
2020	13.11482
2025	12.30487
2030	11.39601
2035	10.55191
2040	9.82103
2045	9.16328
2050	8.55989
2055	7.9968
2060	7.43664
2065	6.93835
2070	6.52906
2075	6.1949
2080	5.93242
2085	5.72591
2090	5.55641
2095	5.4173
2100	5.30621