Quarterly US dollars
1986-09-30 1598
1986-12-31 1592
1987-03-31 1709
1987-06-30 1737
1987-09-30 1668
1987-12-31 1623
1988-03-31 1685
1988-06-30 1630
1988-09-30 1702
1988-12-31 1789
1989-03-31 1587
1989-06-30 1492
1989-09-30 1444
1989-12-31 1332
1990-03-31 1308
1990-06-30 1302
1990-09-30 1323
1990-12-31 1351
1991-03-31 1338
1991-06-30 1275
1991-09-30 1292
1991-12-31 1327
1992-03-31 1253
1992-06-30 1260
1992-09-30 1273
1992-12-31 1129
1993-03-31 1203
1993-06-30 1225
1993-09-30 1164
1993-12-31 1319
1994-03-31 1316
1994-06-30 1311
1994-09-30 1418
1994-12-31 1724
1995-03-31 1487
1995-06-30 1596
1995-09-30 1755
1995-12-31 1852
1996-03-31 1908
1996-06-30 2429
1996-09-30 2667
1996-12-31 3150
1997-03-31 3678
1997-06-30 3583
1997-09-30 4061
1997-12-31 3226
1998-03-31 3162
1998-06-30 2654
1998-09-30 2584
1998-12-31 2635
1999-03-31 2483
1999-06-30 2417
1999-09-30 2024
1999-12-31 1711
2000-03-31 1457
2000-06-30 1324
2000-09-30 1344
2000-12-31 1201
2001-03-31 1198
2001-06-30 1222
2001-09-30 1047
2001-12-31 1206
2002-03-31 1289
2002-06-30 1375
2002-09-30 1396
2002-12-31 1303
2003-03-31 1283
2003-06-30 1388
2003-09-30 1186
2003-12-31 1198
2004-03-31 1300
2004-06-30 1293
2004-09-30 1424
2004-12-31 1508
2005-03-31 1677
2005-06-30 1556
2005-09-30 1724
2005-12-31 1809
2006-03-31 2008
2006-06-30 2359
2006-09-30 1930
2006-12-31 2002
2007-03-31 2607
2007-06-30 2516
2007-09-30 2383
2007-12-31 2385
2008-03-31 2000
2008-06-30 2029
2008-09-30 1705
2008-12-31 1444
2009-03-31 1530
2009-06-30 1395
2009-09-30 2026
2009-12-31 2099
2010-03-31 2844
2010-06-30 2500
2010-09-30 3019
2010-12-31 2664
2011-03-31 2800
2011-06-30 2875
2011-09-30 2785
2011-12-31 2103
2012-03-31 1988
2012-06-30 1966
2012-09-30 2225
2012-12-31 2884
2013-03-31 2687
2013-06-30 2942
2013-09-30 3033
2013-12-31 3034
2014-03-31 2945
2014-06-30 3597
2014-09-30 3794
2014-12-31 3576
2015-03-31 3491
2015-06-30 3378
2015-09-30 3700
2015-12-31 3806
2016-03-31 2909
2016-06-30 3027
2016-09-30 3146
2016-12-31 2965
2017-03-31 3161
2017-06-30 3438
2017-09-30 3116
2017-12-31 3051
2018-03-31 2423
2018-06-30 3902
2018-09-30 2848
2018-12-31 2888
2019-03-31 2915
2019-06-30 2844
2019-09-30 2744
2019-12-31 2235
2020-03-31 2558
2020-06-30 2617
2020-09-30 2219
2020-12-31 2358
2021-03-31 2252
2021-06-30 2322
2021-09-30 2227
2021-12-31 2086
2022-03-31 2835
2022-06-30 2440
2022-09-30 1997
2022-12-31 1720
2023-03-31 1506
2023-06-30 2268
2023-09-30 1976