Quarter	Percent
1998-01-01	11.88172066521190
1998-04-01	12.11854346089920
1998-07-01	11.44166527207430
1998-10-01	11.92055529182330
1999-01-01	11.88895177282290
1999-04-01	11.68977465959080
1999-07-01	11.05406555981270
1999-10-01	11.08127347050120
2000-01-01	11.37799709424780
2000-04-01	10.84160798797030
2000-07-01	10.13407289080710
2000-10-01	9.99941258905569
2001-01-01	10.05069746005300
2001-04-01	9.59491068747171
2001-07-01	9.16434831719204
2001-10-01	9.28762541806020
2002-01-01	9.20820819141261
2002-04-01	9.20745142551913
2002-07-01	8.68535825545171
2002-10-01	8.92748880897607
2003-01-01	9.09999666788844
2003-04-01	8.86580644628167
2003-07-01	8.24804434201505
2003-10-01	8.47483574135677
2004-01-01	8.66382041269302
2004-04-01	7.86576441762181
2004-07-01	7.31310049070141
2004-10-01	8.15202974317535
2005-01-01	8.25626414767597
2005-04-01	7.52208206430823
2005-07-01	7.09572944131874
2005-10-01	8.04097928560045
2006-01-01	7.59224335847819
2006-04-01	6.52432419224786
2006-07-01	6.07327207384148
2006-10-01	6.91342380640942
2007-01-01	6.36785393594732
2007-04-01	5.70533327310284
2007-07-01	5.63879174591488
2007-10-01	6.58911740719853
2008-01-01	7.03886948779764
2008-04-01	6.72804447419366
2008-07-01	6.09018722226269
2008-10-01	7.03630416346969
2009-01-01	7.91010980165780
2009-04-01	7.30624675997926
2009-07-01	7.26637797432846
2009-10-01	8.50789636852151
2010-01-01	9.02277605774966
2010-04-01	8.29069654480101
2010-07-01	7.50617996044825
2010-10-01	8.61703333171450
2011-01-01	8.54398402720569
2011-04-01	7.73452384337589
2011-07-01	7.61933215737152
2011-10-01	9.51718553320452
2012-01-01	10.84986860570980
2012-04-01	10.45564986904800
2012-07-01	9.73419540229885
2012-10-01	11.56531504998860
2013-01-01	12.71009232225990
2013-04-01	11.99906526509240
2013-07-01	11.24131423865150
2013-10-01	12.63035374427860
2014-01-01	13.53111603146940
2014-04-01	12.20499545617270
2014-07-01	11.72631504274110
2014-10-01	13.25675340383960
2015-01-01	12.96842535241140
2015-04-01	12.11603895571190
2015-07-01	10.57002717047900
2015-10-01	11.92102108785370
2016-01-01	12.11098730363000
2016-04-01	11.54148764665500
2016-07-01	10.92986143546630
2016-10-01	12.16978480422920
2017-01-01	12.13245954880240
2017-04-01	10.94886569627970
2017-07-01	10.55825149090800
2017-10-01	11.20511627370370
2018-01-01	11.60542109310690
2018-04-01	10.67141036129450