Multnomah County Library Fy 03-04 collection turnover rates
Turnover rate is a measure of how hard the collection works. Turnover is calculated as circulation divided by holdings, accounting for LOST items.
library material
circulation
(dynix only)
holdings
(excl. Lost)
turnover
rate
1,934,571
75,639
25.6
DVD
816,935
35,731
22.9
CD-ROM
109,696
4,854
22.6
2,052,166
114,326
18.0
Audio
Board books &
catalogued Pb
748,298
45,663
16.4
334,186
21,116
15.8
Juvenile Fiction
651,668
61,837
10.5
Picture books (JE)
1,615,009
154,223
10.5
Fiction
2,098,367
207,922
10.1
464,088
46,541
10.0
Non-fiction
6,018,557
673,112
8.9
Juvenile Non-fiction
1,046,573
142,770
7.3
Large Print
165,993
24,653
6.7
Int'l Languages
236,376
39,363
6.0
Music Scores
160,538
44,281
3.6
70,026
247,646
0.3
18,523,047
1,939,677
9.5
Video
CD
Young Adult
Other
Total
circulation figures here do not include non-barcoded circ that occurs via LOS and youth outreach.
a note about LOST agency:
LOST material is that which has been overdue to a patron for 49 days or more, or material a patron has lost and paid.
After 6 months in LOST status, items are changed to the LOST agency and masked in the public access catalog.
LOST item records are purged from DYNA after three years (as of 8/02 per Brenda Clark.) Upon purging, the lost item information and charge is cleared from any patron record to
which it was attached.