Year	Percent
1950	11.78895
1955	12.78992
1960	10.46738
1965	8.3728
1970	8.17669
1975	8.31819
1980	8.94231
1985	7.33525
1990	6.37723
1995	5.58801
2000	5.02513
2005	4.85731
2010	4.62636
2015	4.56581
2020	4.491
2025	4.36254
2030	4.26985
2035	4.25444
2040	4.30303
2045	4.37134
2050	4.42344
2055	4.45085
2060	4.46642
2065	4.49566
2070	4.55588
2075	4.62115
2080	4.66419
2085	4.68709
2090	4.67817
2095	4.65638
2100	4.64092