Year	Percent
1950	10.83854
1955	9.84068
1960	9.39993
1965	9.7122
1970	11.08062
1975	10.89653
1980	10.58707
1985	10.70446
1990	11.13251
1995	11.57319
2000	11.68602
2005	11.28849
2010	11.69991
2015	11.61572
2020	11.24502
2025	10.12422
2030	9.60111
2035	9.26645
2040	8.86671
2045	8.41343
2050	7.94476
2055	7.50878
2060	7.119
2065	6.78381
2070	6.49148
2075	6.24144
2080	6.0059
2085	5.8072
2090	5.63549
2095	5.5014
2100	5.38531