Year	Percent
1950	13.51625
1955	13.76713
1960	14.3588
1965	15.1709
1970	15.78637
1975	14.62833
1980	13.765
1985	13.32526
1990	12.78618
1995	11.87781
2000	10.00751
2005	8.4515
2010	7.6853
2015	7.86253
2020	8.87871
2025	8.2814
2030	7.41926
2035	6.58933
2040	6.10328
2045	6.0589
2050	6.18281
2055	6.1579
2060	5.89696
2065	5.53653
2070	5.28596
2075	5.21827
2080	5.25587
2085	5.2727
2090	5.19852
2095	5.05629
2100	4.93376