Table:
agency
2017
preliminary

2018
% change 2017-18

all agencies
69641.8
71262.7
2.3

basic research
33265.4
33711.9
1.3

applied research
36376.4
37550.8
3.2

department of agriculture
2216.3
2341.9
5.7

basic research
965.2
1006.8
4.3

applied research
1251.1
1335.1
6.7

department of defense
7178
7690.7
7.1

basic research
2110.1
2261.2
7.2

applied research
5068
5429.4
7.1

department of energy
9355
11381.3
21.7

basic research
4494.3
4930.3
9.7

applied research
4861
6451
32.7

department of health and human services
33677.4
33453.9
-0.7

basic research
16700.1
16733.5
0.2

applied research
16977.3
16720.4
-1.5

national aeronautics and space administration
5745.3
6234.4
8.5

basic research
3425.8
3712.5
8.4

applied research
2319.5
2521.9
8.7

national science foundation
5517.6
4950.3
-10.3

basic research
4739.1
4279.5
-9.7

applied research
778.6
670.8
-13.8

all other departments and agencies
5952.2
5210.4
-12.5

basic research
831
788.1
-5.1

applied research
5121.3
4422.2
-13.6

Statement: the department of health and human services of federal research obligations.
Question: which agency accounted for the largest share of federal research obligations?
Answer: department of health and human services