Year	Percent
1950	9.8617
1955	7.5367
1960	6.84873
1965	9.52537
1970	10.6762
1975	9.65893
1980	7.79734
1985	7.82035
1990	8.12077
1995	8.87461
2000	9.40417
2005	7.3115
2010	5.67023
2015	4.60273
2020	4.98946
2025	5.15677
2030	4.7158
2035	4.27365
2040	3.99239
2045	3.83805
2050	3.89943
2055	4.05314
2060	4.12347
2065	4.07945
2070	4.02689
2075	4.06382
2080	4.20916
2085	4.40065
2090	4.54021
2095	4.56868
2100	4.53156