Year	Ratio
1990-01-01	1.090989947319030
1991-01-01	1.089089989662170
1992-01-01	1.094889998435970
1993-01-01	1.109509944915770
1994-01-01	1.099269986152650
1995-01-01	1.041640043258670
1996-01-01	1.032950043678280
1997-01-01	1.031690001487730
1999-01-01	0.980490028858185
2000-01-01	1.022459983825680
2001-01-01	1.024340033531190
2002-01-01	1.029479980468750
2003-01-01	1.035989999771120
2004-01-01	1.047999978065490
2005-01-01	1.043149948120120
2006-01-01	1.044630050659180
2007-01-01	1.031810045242310
2008-01-01	1.029729962348940
2009-01-01	1.024520039558410
2010-01-01	1.023579955101010
2011-01-01	1.021379947662350
2012-01-01	1.017130017280580
2013-01-01	1.012940049171450
2014-01-01	1.012770056724550
2015-01-01	1.008080005645750