Research Library Trends Tables and Graphs · 9
Graph 1
Service Trends
in
ARL Libraries, 1991–2008
-60%
-40%
-20%
0%
20%
40%
60%
80%
100%
120%
140%
160%
180%
Reference
Transactions
(-53%)
Initial
Circulation**
(-26%)
Total
Circulation**
(-16%)
Total
Staff
(-4%)
Total
Students
(+24%)
Circulation
Ratio:
Initial to Total
(+26%)
Group
Presentations
(+58%)
Participants
in Group
Presentations
(+117%)
Interlibrary
Borrowing
(+168%)
%
C
h
a
n
g
e
S
i
n
c
e
1
9
9
1
**Total
Circulation includes Initial and Renewal but excludes Reserve Circulation.
Source: ARL Statistics 2007–2008, Association of Research Libraries, Washington, DC
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