Year	Percent
1950	11.61558
1955	10.99425
1960	10.41933
1965	11.21445
1970	12.27579
1975	12.53643
1980	11.45258
1985	10.80677
1990	10.09994
1995	10.53083
2000	10.84469
2005	10.35049
2010	9.27392
2015	6.70289
2020	5.37407
2025	5.7201
2030	5.60595
2035	5.58842
2040	5.41228
2045	5.02612
2050	4.64433
2055	4.51247
2060	4.58085
2065	4.6377
2070	4.60319
2075	4.485
2080	4.35988
2085	4.32383
2090	4.3959
2095	4.49569
2100	4.53537