Year	Percent
1950	11.89785
1955	11.98977
1960	13.56619
1965	13.52179
1970	13.40685
1975	13.08417
1980	12.90534
1985	12.66961
1990	12.7345
1995	12.26515
2000	11.52949
2005	10.93815
2010	10.36686
2015	9.69991
2020	8.69136
2025	8.27715
2030	7.86322
2035	7.46646
2040	7.02815
2045	6.5959
2050	6.26376
2055	6.03247
2060	5.84087
2065	5.65733
2070	5.49152
2075	5.34925
2080	5.2405
2085	5.1633
2090	5.10553
2095	5.04436
2100	4.98482