Year	Percent
1950	11.32086
1955	13.50121
1960	15.05202
1965	15.52192
1970	14.04786
1975	14.20286
1980	10.21289
1985	9.3429
1990	8.47704
1995	8.56057
2000	8.14529
2005	7.6901
2010	7.20165
2015	7.30454
2020	5.86521
2025	6.04703
2030	5.7595
2035	5.77977
2040	5.9458
2045	5.99908
2050	5.78548
2055	5.53212
2060	5.45046
2065	5.46538
2070	5.48193
2075	5.44391
2080	5.30239
2085	5.1153
2090	4.98484
2095	4.95999
2100	4.99141