Year	Percent
1950	16.66207
1955	17.16855
1960	17.54288
1965	17.45797
1970	16.81242
1975	15.92174
1980	14.56546
1985	13.35931
1990	12.5276
1995	11.70875
2000	11.28006
2005	10.59525
2010	10.12307
2015	9.72136
2020	9.02847
2025	8.45841
2030	7.9828
2035	7.55087
2040	7.14855
2045	6.79296
2050	6.46353
2055	6.16858
2060	5.919
2065	5.7144
2070	5.52916
2075	5.36941
2080	5.22867
2085	5.10305
2090	4.99518
2095	4.90302
2100	4.82393