Year	Percent
1950	10.75215
1955	10.95062
1960	11.17378
1965	10.32253
1970	10.51868
1975	10.34321
1980	9.73714
1985	10.6041
1990	9.51407
1995	10.40518
2000	9.84919
2005	9.71941
2010	9.8602
2015	10.32233
2020	10.90543
2025	11.06398
2030	11.06965
2035	11.07006
2040	11.10525
2045	11.10291
2050	11.0463
2055	10.93626
2060	10.76871
2065	10.55002
2070	10.29862
2075	10.01662
2080	9.71513
2085	9.38382
2090	9.08341
2095	8.75386
2100	8.45242