Quarter	Millions of US Dollars
1999-10-01	1788
2000-01-01	1764
2000-04-01	1775
2000-07-01	1697
2000-10-01	1827
2001-01-01	1769
2001-04-01	1671
2001-07-01	1852
2001-10-01	1712
2002-01-01	1736
2002-04-01	1999
2002-07-01	2025
2002-10-01	1860
2003-01-01	2045
2003-04-01	2240
2003-07-01	2232
2003-10-01	1679
2004-01-01	1627
2004-04-01	2335
2004-07-01	2443
2004-10-01	2570
2005-01-01	2403
2005-04-01	2298
2005-07-01	2325
2005-10-01	2180
2006-01-01	2405
2006-04-01	2471
2006-07-01	2557
2006-10-01	2232
2007-01-01	2154
2007-04-01	2022
2007-07-01	2110
2007-10-01	2082
2008-01-01	2214
2008-04-01	2331
2008-07-01	2076
2008-10-01	1853
2009-01-01	1922
2009-04-01	1439
2009-07-01	1689
2009-10-01	1407
2010-01-01	1312
2010-04-01	1162
2010-07-01	1309
2010-10-01	1400
2011-01-01	1365
2011-04-01	1179
2011-07-01	1110
2011-10-01	1091
2012-01-01	1331
2012-04-01	1157
2012-07-01	928
2012-10-01	1060
2013-01-01	940
2013-04-01	1305
2013-07-01	1294
2013-10-01	1439
2014-01-01	1917
2014-04-01	1820
2014-07-01	1906
2014-10-01	1864
2015-01-01	1550
2015-04-01	1635
2015-07-01	1813
2015-10-01	1758
2016-01-01	3078
2016-04-01	2678
2016-07-01	2723
2016-10-01	3024
2017-01-01	3042
2017-04-01	3529
2017-07-01	3611
2017-10-01	3487
2018-01-01	3827