Quarter	Percent
1999-03-31	3.0467
1999-06-30	2.627
1999-09-30	2.7003
1999-12-31	3.4293
2000-03-31	3.5535
2000-06-30	4.2829
2000-09-30	4.736
2000-12-31	5.0415
2001-03-31	4.7449
2001-06-30	4.5888
2001-09-30	4.2784
2001-12-31	3.4803
2002-03-31	3.3614
2002-06-30	3.4466
2002-09-30	3.3587
2002-12-31	3.1154
2003-03-31	2.6854
2003-06-30	2.3598
2003-09-30	2.139
2003-12-31	2.1493
2004-03-31	2.0618
2004-06-30	2.0835
2004-09-30	2.1162
2004-12-31	2.1635
2005-03-31	2.1401
2005-06-30	2.1244
2005-09-30	2.1305
2005-12-31	2.3414
2006-03-31	2.6156
2006-06-30	2.8953
2006-09-30	3.221
2006-12-31	3.5902
2007-03-31	3.8204
2007-06-30	4.0668
2007-09-30	4.4901
2007-12-31	4.7188
2008-03-31	4.4763
2008-06-30	4.8593
2008-09-30	4.982
2008-12-31	4.2424
2009-03-31	2.0068
2009-06-30	1.3089
2009-09-30	0.8717
2009-12-31	0.7223
2010-03-31	0.6613
2010-06-30	0.6877
2010-09-30	0.8747
2010-12-31	1.021
2011-03-31	1.0973
2011-06-30	1.4166
2011-09-30	1.5617
2011-12-31	1.497
2012-03-31	1.0382
2012-06-30	0.6956
2012-09-30	0.3627
2012-12-31	0.1958
2013-03-31	0.2112
2013-06-30	0.2068
2013-09-30	0.2235
2013-12-31	0.2399
2014-03-31	0.2952
2014-06-30	0.2978
2014-09-30	0.1646
2014-12-31	0.0815
2015-03-31	0.0457
2015-06-30	-0.0067
2015-09-30	-0.0276
2015-12-31	-0.0885
2016-03-31	-0.1867
2016-06-30	-0.2583
2016-09-30	-0.2982
2016-12-31	-0.3124
2017-03-31	-0.328
2017-06-30	-0.3299
2017-09-30	-0.3296
2017-12-31	-0.3289
2018-03-31	-0.3283
2018-06-30	-0.3253
2018-09-30	-0.3195
2018-12-31	-0.3154
2019-03-31	-0.3085
2019-06-30	-0.317
2019-09-30	-0.3956
2019-12-31	-0.4033