Year	Percent
1950	10.06163
1955	9.88728
1960	9.57169
1965	9.34262
1970	10.18087
1975	10.06066
1980	10.01553
1985	10.23186
1990	10.74198
1995	11.08909
2000	11.54773
2005	11.35782
2010	10.95015
2015	10.48556
2020	10.42721
2025	10.81834
2030	11.02878
2035	10.56969
2040	10.11794
2045	9.7866
2050	9.58239
2055	9.42046
2060	9.21444
2065	8.95611
2070	8.65998
2075	8.37761
2080	8.1385
2085	7.92955
2090	7.71604
2095	7.49862
2100	7.27696