Year	Percent
1950	13.7111
1955	11.34572
1960	9.88147
1965	10.33747
1970	11.69768
1975	14.48307
1980	10.19421
1985	11.78939
1990	12.63394
1995	12.17152
2000	11.46174
2005	10.00381
2010	9.34123
2015	8.93451
2020	9.07449
2025	8.42667
2030	7.91943
2035	7.42449
2040	7.01228
2045	6.71403
2050	6.51916
2055	6.3526
2060	6.18531
2065	6.00171
2070	5.84434
2075	5.71977
2080	5.62254
2085	5.54549
2090	5.46573
2095	5.38537
2100	5.30474