Quarter	US Dollars, Sum Over Component Sub-periods
1990-01-01	8954694015.55280
1990-04-01	9050751879.69925
1990-07-01	9188751770.18005
1990-10-01	8622965875.49866
1991-01-01	8049307958.47751
1991-04-01	7874586692.96363
1991-07-01	8512733842.29850
1991-10-01	7254711995.77242
1992-01-01	8003340032.26811
1992-04-01	7943072415.23650
1992-07-01	7389289678.13540
1992-10-01	6795995985.42074
1993-01-01	8092407671.58028
1993-04-01	8640025189.57781
1993-07-01	7826286999.64215
1993-10-01	8016408294.74532
1994-01-01	7685580840.70357
1994-04-01	9102659946.46345
1994-07-01	9308911468.71506
1994-10-01	9423643760.20073
1995-01-01	10116113744.07580
1995-04-01	11394472667.16900
1995-07-01	10743053848.04520
1995-10-01	10459114704.94260
1996-01-01	10086653847.09000
1996-04-01	10680474818.03530
1996-07-01	10839029848.93080
1996-10-01	10275159172.79500
1997-01-01	11313356710.23270
1997-04-01	11390104341.97240
1997-07-01	12330942869.51920
1997-10-01	11089610143.83040
1998-01-01	11338753261.27470
1998-04-01	10979705604.57030
1998-07-01	10448020782.88050
1998-10-01	10469972761.46830
1999-01-01	11212528951.14150
1999-04-01	11663272233.53700
1999-07-01	11683232740.24550
1999-10-01	11494000452.79600
2000-01-01	11755947601.45910
2000-04-01	12401234289.83290
2000-07-01	12163986053.31230
2000-10-01	12143933931.96570
2001-01-01	12537792029.31750
2001-04-01	11992992624.95400
2001-07-01	9939805825.24272
2001-10-01	9110998543.65858
2002-01-01	9652201192.09453
2002-04-01	9321106821.10682
2002-07-01	10126687567.98260
2002-10-01	11131406240.04420
2003-01-01	11304338222.30080
2003-04-01	10901023402.27580
2003-07-01	11117340034.79610
2003-10-01	11286105199.14870
2004-01-01	12197485263.23780
2004-04-01	13290813197.59600
2004-07-01	12684189058.27770
2004-10-01	12507033021.05810
2005-01-01	15360920040.23820
2005-04-01	15367481505.30720
2005-07-01	15952301811.53400
2005-10-01	16403135116.71490
2006-01-01	18532367038.17060
2006-04-01	18346054468.23680
2006-07-01	18502839135.47580
2006-10-01	19030021067.41570
2007-01-01	20736599522.02120
2007-04-01	22600121359.22330
2007-07-01	23075892857.14290
2007-10-01	23453193439.95110
2008-01-01	23118946530.44980
2008-04-01	24451993799.26780
2008-07-01	22968600115.11160
2008-10-01	19571852829.56610
2009-01-01	14356867573.06500
2009-04-01	16167885296.46980
2009-07-01	17944402248.21510
2009-10-01	18884609313.33860
2010-01-01	20618454344.55370
2010-04-01	19483753810.23410
2010-07-01	20647375850.12190
2010-10-01	23147453612.31740
2011-01-01	22997904272.57980
2011-04-01	22322025142.06990
2011-07-01	23306569591.39930
2011-10-01	24763223935.07810
2012-01-01	24057546290.12920
2012-04-01	21895396799.20810
2012-07-01	23816671133.74430
2012-10-01	25428859737.63870
2013-01-01	23940315278.09910
2013-04-01	23655875455.96660
2013-07-01	22663671373.55580
2013-10-01	24961577543.50310