Quarter	US dollars
1986-09-30	1579
1986-12-31	1515
1987-03-31	1374
1987-06-30	1347
1987-09-30	1360
1987-12-31	1414
1988-03-31	1410
1988-06-30	1550
1988-09-30	1511
1988-12-31	1913
1989-03-31	1874
1989-06-30	1861
1989-09-30	1732
1989-12-31	1583
1990-03-31	1972
1990-06-30	1895
1990-09-30	2012
1990-12-31	1893
1991-03-31	1857
1991-06-30	1761
1991-09-30	1818
1991-12-31	1937
1992-03-31	1940
1992-06-30	2230
1992-09-30	2251
1992-12-31	2177
1993-03-31	2368
1993-06-30	2422
1993-09-30	2450
1993-12-31	2720
1994-03-31	2776
1994-06-30	2751
1994-09-30	2764
1994-12-31	2777
1995-03-31	2623
1995-06-30	2728
1995-09-30	2235
1995-12-31	2185
1996-03-31	2217
1996-06-30	2205
1996-09-30	2182
1996-12-31	2201
1997-03-31	2162
1997-06-30	2390
1997-09-30	1865
1997-12-31	1749
1998-03-31	1826
1998-06-30	1849
1998-09-30	1968
1998-12-31	1958
1999-03-31	2004
1999-06-30	1995
1999-09-30	2001
1999-12-31	1935
2000-03-31	1856
2000-06-30	1764
2000-09-30	1374
2000-12-31	1401
2001-03-31	1315
2001-06-30	1398
2001-09-30	1380
2001-12-31	1288
2002-03-31	1309
2002-06-30	1300
2002-09-30	1244
2002-12-31	1094
2003-03-31	1126
2003-06-30	1222
2003-09-30	1391
2003-12-31	1576
2004-03-31	1778
2004-06-30	2214
2004-09-30	2601
2004-12-31	2697
2005-03-31	2946
2005-06-30	2993
2005-09-30	2326
2005-12-31	2418
2006-03-31	2441
2006-06-30	2532
2006-09-30	2482
2006-12-31	2554
2007-03-31	2337
2007-06-30	2042
2007-09-30	2195
2007-12-31	2287
2008-03-31	2772
2008-06-30	2775
2008-09-30	2794
2008-12-31	2523
2009-03-31	2724
2009-06-30	2777
2009-09-30	2758
2009-12-31	2837
2010-03-31	2826
2010-06-30	2833
2010-09-30	2780
2010-12-31	2890
2011-03-31	2837
2011-06-30	2789
2011-09-30	2718
2011-12-31	2629
2012-03-31	2686
2012-06-30	2557
2012-09-30	2929
2012-12-31	3096
2013-03-31	2827
2013-06-30	3046
2013-09-30	2840
2013-12-31	2841
2014-03-31	3374
2014-06-30	2697
2014-09-30	2784
2014-12-31	2529
2015-03-31	2450
2015-06-30	3613
2015-09-30	3219
2015-12-31	3336
2016-03-31	3342
2016-06-30	3199
2016-09-30	2790
2016-12-31	2204
2017-03-31	2095
2017-06-30	1636
2017-09-30	1442
2017-12-31	1335
2018-03-31	1269
2018-06-30	1310
2018-09-30	1278
2018-12-31	1275
2019-03-31	1326
2019-06-30	1302
2019-09-30	1047
2019-12-31	1004
2020-03-31	933
2020-06-30	908
2020-09-30	904
2020-12-31	952
2021-03-31	964
2021-06-30	982
2021-09-30	1023
2021-12-31	937
2022-03-31	832
2022-06-30	780
2022-09-30	929
2022-12-31	830
2023-03-31	907
2023-06-30	963
2023-09-30	900