Quarter	Percent
1999-03-31	2.971
1999-06-30	2.669
1999-09-30	3.126
1999-12-31	3.338
2000-03-31	3.831
2000-06-30	4.547
2000-09-30	4.996
2000-12-31	4.855
2001-03-31	4.561
2001-06-30	4.441
2001-09-30	3.66
2001-12-31	3.294
2002-03-31	3.448
2002-06-30	3.441
2002-09-30	3.297
2002-12-31	2.865
2003-03-31	2.522
2003-06-30	2.147
2003-09-30	2.128
2003-12-31	2.124
2004-03-31	1.958
2004-06-30	2.12
2004-09-30	2.148
2004-12-31	2.154
2005-03-31	2.147
2005-06-30	2.106
2005-09-30	2.176
2005-12-31	2.488
2006-03-31	2.816
2006-06-30	3.056
2006-09-30	3.417
2006-12-31	3.725
2007-03-31	3.924
2007-06-30	4.175
2007-09-30	4.792
2007-12-31	4.684
2008-03-31	4.727
2008-06-30	4.947
2008-09-30	5.277
2008-12-31	2.892
2009-03-31	1.51
2009-06-30	1.099
2009-09-30	0.753
2009-12-31	0.7
2010-03-31	0.634
2010-06-30	0.767
2010-09-30	0.892
2010-12-31	1.006
2011-03-31	1.239
2011-06-30	1.547
2011-09-30	1.554
2011-12-31	1.356
2012-03-31	0.777
2012-06-30	0.653
2012-09-30	0.22
2012-12-31	0.187
2013-03-31	0.211
2013-06-30	0.218
2013-09-30	0.225
2013-12-31	0.287
2014-03-31	0.313
2014-06-30	0.207
2014-09-30	0.083
2014-12-31	0.078
2015-03-31	0.019
2015-06-30	-0.014
2015-09-30	-0.04
2015-12-31	-0.131
2016-03-31	-0.244
2016-06-30	-0.286
2016-09-30	-0.301
2016-12-31	-0.319
2017-03-31	-0.329
2017-06-30	-0.331
2017-09-30	-0.329
2017-12-31	-0.329
2018-03-31	-0.328
2018-06-30	-0.321
2018-09-30	-0.318
2018-12-31	-0.309
2019-03-31	-0.311
2019-06-30	-0.345
2019-09-30	-0.418
2019-12-31	-0.383