Year	Percent
1950	8.19931
1955	7.64408
1960	11.72383
1965	15.53116
1970	16.01168
1975	12.71418
1980	8.54744
1985	7.80154
1990	5.79627
1995	7.83396
2000	8.9089
2005	7.45354
2010	4.81338
2015	2.98313
2020	3.34497
2025	4.47436
2030	5.15194
2035	4.98558
2040	4.54422
2045	4.10263
2050	3.98063
2055	4.19137
2060	4.52914
2065	4.76004
2070	4.79214
2075	4.70474
2080	4.63118
2085	4.65941
2090	4.76046
2095	4.84255
2100	4.84728