Table:
revised average level
previously published average level
average revision

millions of dollars

average 2015 to 2017

household final consumption expenditure
1,160,059
1,160,312
-253

government final consumption expenditure
428,225
431,113
-2,888

non-profit institutions serving households' final consumption expenditure
30,680
29,558
1,122

business gross fixed capital formation
394,958
398,170
-3,212

government gross fixed capital formation
77,427
79,311
-1,885

non-profit institutions serving households' gross fixed capital formation
2,979
3,054
-75

inventories
5,621
6,215
-594

exports
640,918
640,684
235

imports
690,941
689,780
1,161

gross domestic product at market prices
2,049,060
2,058,544
-9,483

2015

household final consumption expenditure
1,118,489
1,117,690
799

government final consumption expenditure
415,561
417,011
-1,450

non-profit institutions serving households' final consumption expenditure
28,575
28,535
40

business gross fixed capital formation
395,432
398,389
-2,957

government gross fixed capital formation
76,344
74,618
1,726

non-profit institutions serving households' gross fixed capital formation
2,956
2,981
-25

inventories
-46
3,940
-3,986

exports
627,848
628,955
-1,107

imports
677,939
678,265
-326

gross domestic product at market prices
1,985,829
1,994,911
-9,082

2016

household final consumption expenditure
1,153,256
1,154,829
-1,573

government final consumption expenditure
426,282
429,594
-3,312

non-profit institutions serving households' final consumption expenditure
30,975
29,492
1,483

business gross fixed capital formation
386,668
389,592
-2,924

government gross fixed capital formation
75,064
79,762
-4,698

non-profit institutions serving households' gross fixed capital formation
2,905
3,065
-160

inventories
-606
-487
-119

exports
631,229
630,353
876

imports
680,791
679,538
1,253

gross domestic product at market prices
2,023,824
2,035,506
-11,682

2017

household final consumption expenditure
1,208,432
1,208,417
15

government final consumption expenditure
442,831
446,734
-3,903

non-profit institutions serving households' final consumption expenditure
32,490
30,647
1,843

business gross fixed capital formation
402,774
406,528
-3,754

government gross fixed capital formation
80,872
83,554
-2,682

non-profit institutions serving households' gross fixed capital formation
3,077
3,117
-40

inventories
17,515
15,192
2,323

exports
663,678
662,743
935

imports
714,094
711,538
2,556

gross domestic product at market prices
2,137,528
2,145,214
-7,686

Statement: the revisions to the estimates of business inventories were decreased by $4.0 billion in 2015.
Question: how many millions of dollars have the revisions to estimates of business inventories been decreased in 2015?
Answer: [-40]