Year	Percent
1950	13.86039
1955	14.23658
1960	14.21672
1965	14.64912
1970	14.86841
1975	15.12774
1980	12.72943
1985	11.3808
1990	10.83593
1995	10.81098
2000	10.12773
2005	8.94639
2010	7.92871
2015	7.88878
2020	7.54863
2025	7.19656
2030	6.87445
2035	6.5589
2040	6.26479
2045	6.04294
2050	5.89443
2055	5.77337
2060	5.64934
2065	5.50904
2070	5.3766
2075	5.26797
2080	5.18506
2085	5.12311
2090	5.06492
2095	5.00631
2100	4.94812