Year	Percent
1950	7.5863
1955	8.63849
1960	12.15095
1965	14.24328
1970	14.61875
1975	12.91574
1980	12.10749
1985	11.70577
1990	12.46574
1995	13.1393
2000	11.89371
2005	9.98741
2010	9.12046
2015	10.20334
2020	11.79256
2025	10.55881
2030	9.32163
2035	8.46977
2040	8.23475
2045	8.2444
2050	8.12073
2055	7.76925
2060	7.27863
2065	6.83573
2070	6.56077
2075	6.42326
2080	6.30412
2085	6.12293
2090	5.88475
2095	5.65785
2100	5.49341