Year	Percent
1950	8.74982
1955	9.80533
1960	8.84015
1965	9.8366
1970	10.86637
1975	11.65577
1980	12.38906
1985	12.11814
1990	11.06466
1995	10.92937
2000	10.52867
2005	9.8449
2010	9.63372
2015	8.8911
2020	7.98523
2025	7.75631
2030	7.14822
2035	6.71898
2040	6.28696
2045	5.90094
2050	5.61836
2055	5.43704
2060	5.28026
2065	5.11792
2070	4.96768
2075	4.81955
2080	4.7232
2085	4.67123
2090	4.63589
2095	4.59543
2100	4.54128