Quarter	US dollars
2004-12-31	1592
2005-03-31	1650
2005-06-30	1602
2005-09-30	1332
2005-12-31	1440
2006-03-31	1754
2006-06-30	2112
2006-09-30	2262
2006-12-31	2031
2007-03-31	2197
2007-06-30	2675
2007-09-30	3258
2007-12-31	2739
2008-03-31	3331
2008-06-30	3339
2008-09-30	3065
2008-12-31	2884
2009-03-31	2756
2009-06-30	2900
2009-09-30	2468
2009-12-31	2618
2010-03-31	2357
2010-06-30	2334
2010-09-30	1928
2010-12-31	2582
2011-03-31	2451
2011-06-30	2538
2011-09-30	2614
2011-12-31	2938
2012-03-31	3457
2012-06-30	3023
2012-09-30	3285
2012-12-31	3083
2013-03-31	3469
2013-06-30	3868
2013-09-30	3454
2013-12-31	3444
2014-03-31	3688
2014-06-30	3089
2014-09-30	3978
2014-12-31	4089
2015-03-31	3675
2015-06-30	3635
2015-09-30	2839
2015-12-31	2476
2016-03-31	2541
2016-06-30	2435
2016-09-30	2231
2016-12-31	2255
2017-03-31	3017
2017-06-30	2633
2017-09-30	2935
2017-12-31	3156
2018-03-31	3282
2018-06-30	3159
2018-09-30	3093
2018-12-31	3247
2019-03-31	3174
2019-06-30	3199
2019-09-30	2990
2019-12-31	2852
2020-03-31	2992
2020-06-30	2849
2020-09-30	2803
2020-12-31	1627
2021-03-31	1923
2021-06-30	1541
2021-09-30	1396
2021-12-31	1329
2022-03-31	1185
2022-06-30	1212
2022-09-30	1242
2022-12-31	1186
2023-03-31	300
2023-06-30	1427
2023-09-30	1215