Year	Percent
1950	12.34437
1955	13.19239
1960	11.47617
1965	8.54612
1970	8.64644
1975	10.50738
1980	11.24583
1985	10.91293
1990	10.39529
1995	10.50261
2000	12.80764
2005	13.266
2010	11.25594
2015	8.16547
2020	6.74454
2025	7.20053
2030	8.11924
2035	7.76818
2040	6.67989
2045	5.55988
2050	5.01144
2055	5.07391
2060	5.32587
2065	5.3334
2070	5.02716
2075	4.66351
2080	4.49043
2085	4.57449
2090	4.75364
2095	4.83842
2100	4.75542