Wisconsin library cardholders vs. population
1960 & 2009.
Source: Wisconsin Public Library Service Data (1960, 2009)
The percentage took a little dip in 2009, as it did in 2005. More expired records purged in these years? Nevertheless, we're still averaging a percentage point of growth per year in the recent past.
Wisconsin library cardholders vs. population
2004-2009.
Source: Wisconsin Public Library Service Data (2009)
Apparently, the number of "Registered Borrowers" wasn't regularly collected, or reported, until 2004.
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