Year	Percent
1950	13.37349
1955	13.14263
1960	14.98403
1965	14.78488
1970	14.96758
1975	14.8002
1980	13.8774
1985	14.9969
1990	15.77743
1995	17.17433
2000	16.73148
2005	14.90188
2010	14.09673
2015	15.05655
2020	15.25879
2025	14.99346
2030	14.22049
2035	13.38044
2040	12.91386
2045	12.68764
2050	12.38052
2055	11.88005
2060	11.30195
2065	10.77723
2070	10.39313
2075	10.09393
2080	9.76506
2085	9.3807
2090	8.95058
2095	8.59011
2100	8.27102