Year	Percent
1950	9.82197
1955	10.29592
1960	13.08873
1965	14.46597
1970	14.27679
1975	13.63694
1980	13.30832
1985	12.45741
1990	12.06848
1995	11.69925
2000	10.93745
2005	8.12554
2010	7.20368
2015	7.30104
2020	7.34778
2025	7.00408
2030	6.70175
2035	6.06463
2040	5.52788
2045	5.38581
2050	5.4429
2055	5.45724
2060	5.35082
2065	5.15325
2070	4.97038
2075	4.90795
2080	4.96158
2085	5.02831
2090	5.02916
2095	4.95135
2100	4.8485