Year	Number
1996	1.18036329746246
1998	1.16662049293518
2000	0.939376175403595
2002	1.12552392482758
2003	1.20039057731628
2004	1.13497161865234
2005	1.15323007106781
2006	1.01727342605591
2007	0.972128868103027
2008	0.967198193073273
2009	0.963811635971069
2010	0.988284409046173
2011	1.00905168056488
2012	1.02567172050476
2013	1.00476729869843