Quarter	Percent
1993-04-01	12.43020863943580
1993-07-01	12.73792093704250
1993-10-01	13.18662999083100
1994-01-01	13.67346938775510
1994-04-01	13.41398181294490
1994-07-01	13.43381389252950
1994-10-01	14.09942950285250
1995-01-01	14.35677599385290
1995-04-01	13.26518193988070
1995-07-01	12.45335064092160
1995-10-01	12.37853312366440
1996-01-01	12.26847241585340
1996-04-01	11.17564590426600
1996-07-01	10.93178565749720
1996-10-01	10.93917816937830
1997-01-01	12.03001548417830
1997-04-01	11.47166178653080
1997-07-01	12.06793206793210
1997-10-01	11.92858858378030
1998-01-01	12.69973765800140
1998-04-01	12.18636563085880
1998-07-01	12.87266095781800
1998-10-01	12.65692038773240
1999-01-01	15.39879225158810
1999-04-01	15.94723747087400
1999-07-01	16.84214646365810
1999-10-01	17.22048475371380
2000-01-01	19.09066326727700
2000-04-01	19.06297346645430
2000-07-01	18.68823347745520
2000-10-01	18.18812644564380
2001-01-01	19.90996833632170
2001-04-01	19.38273956944180
2001-07-01	19.13007236767320
2001-10-01	18.80111064622870
2002-01-01	19.50714751082670
2002-04-01	18.72256872256870
2002-07-01	18.37195075323090
2002-10-01	18.08364496680150
2003-01-01	18.51497281151870
2003-04-01	17.11914958702970
2003-07-01	17.08428246013670
2003-10-01	17.50218872521030
2004-01-01	19.45139046753050
2004-04-01	18.59989393135840
2004-07-01	17.57273545290940
2004-10-01	17.27395919596480
2005-01-01	17.61053906723200
2005-04-01	16.32691941322160
2005-07-01	15.72376857509240
2005-10-01	15.37450722733250
2006-01-01	14.97346331915530
2006-04-01	13.52522322269520
2006-07-01	12.89911079428210
2006-10-01	12.09267281974010
2007-01-01	11.65218051391050
2007-04-01	11.19425662842820
2007-07-01	11.31262412410540
2007-10-01	10.42016806722690
2008-01-01	10.47547734930740
2008-04-01	10.03703565149080
2008-07-01	8.89666605268005
2008-10-01	8.63959691760522
2009-01-01	10.39511171090120
2009-04-01	11.27979409899660
2009-07-01	12.53464395255160
2009-10-01	13.86208171565910
2010-01-01	15.14216688347890
2010-04-01	14.38039172127810
2010-07-01	14.11020378135810
2010-10-01	13.89134275618370
2011-01-01	13.96507793764990
2011-04-01	13.22632543869500
2011-07-01	13.22012438088850
2011-10-01	14.05878859857480
2012-01-01	14.08455909527680
2012-04-01	13.63518662375620
2012-07-01	13.69630884844910
2012-10-01	14.43733589734110
2013-01-01	14.53330395828740
2013-04-01	14.04305601713380
2013-07-01	14.06273008393460
2013-10-01	14.24623208165970
2014-01-01	14.10676785911650
2014-04-01	13.15129151291510
2014-07-01	12.86620467128660
2014-10-01	12.61284309784000
2015-01-01	12.42265587815330
2015-04-01	11.23191067362080
2015-07-01	11.28761932522040
2015-10-01	10.98689702733110
2016-01-01	10.39277783844780
2016-04-01	9.64196321688976
2016-07-01	9.52329321623478
2016-10-01	9.12872074939419
2017-01-01	8.70844686648501
2017-04-01	8.11636363636364
2017-07-01	7.96902142443544
2017-10-01	7.73003015002361
2018-01-01	7.09248364818942
2018-04-01	6.62989479836353