What is the standing of Astrochemistry among other astronomical communities?

According to simple publication counts using the keyword we get the following relative numbers [in %] (29.10.2007):


keyword

ISI 1997

ISI 2002

Scopus 1997

Scopus 2002

Google scholar

Astronomy

100

100

100

91

100

Astrophysics

69

74

88

100

33

Astrochemistry

14

21

4

5

0.2

Astrobiology

11

16

4

5

0.8