Year	Percent
1950	10.35052
1955	10.22056
1960	10.4027
1965	12.24926
1970	12.10003
1975	11.74693
1980	11.46236
1985	11.42715
1990	11.22987
1995	10.76632
2000	9.80057
2005	9.00814
2010	8.75353
2015	8.21369
2020	7.77985
2025	7.39467
2030	6.86279
2035	6.4488
2040	6.0461
2045	5.7694
2050	5.53716
2055	5.3587
2060	5.18722
2065	5.02231
2070	4.88235
2075	4.78889
2080	4.72288
2085	4.68471
2090	4.64089
2095	4.59682
2100	4.55314