14
Table 3 
Supply and Demand in ARL Libraries, 1986‐2006 
Median Values for Time‐Series Trends21 
 
Year 
 
ILL: 
Borrowed 
ILL: 
Lended 
Graduate
Students 
Teaching 
Faculty
Total 
Students
Serials
Purchased
Serials 
Received 
Monographs
Purchased
(Libraries)  (103)  (103)  (104) (101) (103) (36) (36)  (58)
       
1986 
7,047  16,092  2,327 1,124 16,684 15,775 3,318  32,679
1987 
7,387  16,318  3,078 1,195 17,029 16,514 3,477  26,240
1988 
7,881  17,476  3,251 1,222 17,485 15,948 3,367  25,238
1989 
8,547  19,638  3,312 1,285 17,866 15,983 3,345  27,082
1990 
9,595  20,837  3,314 1,278 17,745 16,128 4,304  27,546
1991 
10,397  23,285  3,310 1,295 18,290 15,962 4,500  27,843
1992 
11,362  22,514  3,539 1,356 18,273 15,673 5,100  26,947
1993 
12,489  22,740  3,745 1,281 18,450 15,441 5,082  25,188
1994 
14,007  24,039  3,794 1,289 18,305 15,099 5,518  25,341
1995 
14,472  24,864  3,914 1,308 18,209 14,320 6,107  25,707
1996 
15,278  25,720  3,904 1,251 18,320 14,723 5,983  25,911
1997 
16,264  25,463  3,942 1,263 18,166 14,820 5,757  28,576
1998 
17,656  27,223  3,880 1,247 18,335 14,063 7,111  24,447
1999 
18,942  26,837  3,933 1,255 18,609 14,192 6,546  25,173
2000 
20,475  27,044  3,844 1,239 18,908 14,541 7,944  28,024
2001 
21,902  28,950  4,159 1,279 19,102 13,682 7,915  30,494
2002 
21,339  29,021  4,067 1,251 19,925 17,594 8,769  31,578
2003 
22,146  33,421  4,167 1,268 21,132 18,115 8,871  33,208
2004 
25,737 33,934 4,461 1,369 21,562 22,311 9,991 30,155
2005 
25,729 36,325 4,595 1,355 22,047 22,404 11,203 30,546
2006 
27,412 36,035 4,647 1,388 22,618 23,849 11,980 33,145
       
Avg annual  
% change 
7.0% 4.1% 3.5% 1.1% 1.5% 2.1% 6.6% 0.1%
 
Table 3 and Graph 3 show that the number of non‐purchased serials received by the average 
ARL library increased by an annual average of 6.6% since 1986.  This category consists of a number of 
types of serials, including government documents, electronic serials made available free of charge 
with the purchase of print counterparts, and open access journals.  Interlibrary borrowing and lending, 
which showed a marked growth in the last decade, seem to be stabilizing. 
 
In 2005‐06 the median subscriptions reached a new high in the history of the time series, and 
monographs purchase rose above 1986 levels for the second time in the last nineteen years.  
 
21 Time series for Monographs Purchased were revised due to unavailable data. 
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