Year	Percent of People Ages 15 and Above
1975-01-01	36.18579
1976-01-01	36.19728
1977-01-01	36.85098
1978-01-01	37.49674
1979-01-01	38.12363
1980-01-01	38.73984
1981-01-01	38.78821
1982-01-01	39.96757
1983-01-01	40.61454
1984-01-01	41.26079
1985-01-01	41.90860
1986-01-01	42.55219
1987-01-01	43.19914
1988-01-01	43.94397
1989-01-01	44.69504
1990-01-01	45.42505
1991-01-01	45.84049
1992-01-01	47.10364
1993-01-01	48.08159
1994-01-01	48.85541
1995-01-01	49.64559
1996-01-01	50.44213
1997-01-01	51.24289
1998-01-01	56.13100
1999-01-01	56.88355
2000-01-01	57.65712
2001-01-01	58.13345
2002-01-01	59.18189
2003-01-01	60.06939
2004-01-01	60.84138
2005-01-01	60.60574
2006-01-01	60.81666
2007-01-01	61.92105
2008-01-01	63.41836
2009-01-01	64.12391
2010-01-01	65.83157
2011-01-01	65.45858
2012-01-01	68.32433
2013-01-01	68.87437
2014-01-01	69.66934
2015-01-01	70.27439
2016-01-01	70.99704