Year	Percent
1950	10.15095
1955	10.51999
1960	11.04266
1965	11.37887
1970	10.04144
1975	10.14322
1980	10.30825
1985	10.48939
1990	10.52725
1995	10.56455
2000	10.55261
2005	11.39346
2010	11.34327
2015	11.27181
2020	11.17373
2025	11.39412
2030	10.65785
2035	10.51476
2040	10.29933
2045	10.01319
2050	9.65577
2055	9.30792
2060	8.9839
2065	8.66996
2070	8.38455
2075	8.10564
2080	7.83487
2085	7.56577
2090	7.3031
2095	7.05329
2100	6.81579