I created my 1st visualization that creates a sortable table of
values. The problem is that when I sort the "Checkouts" column, they
sort like letters and not like numbers even though I specified the
column data type as a number.

Here's the table:
http://library.paulsmiths.edu/test/charts/top5visualization.html

And the json data that it queries:
http://library.paulsmiths.edu/test/charts/top5.php

Notice that that Checkouts column is a number but when you sort the
column, it doesn't sort properly:
{"cols":[{"id":"year","label":"Year","type":"number"},
{"id":"title","label":"Title","type":"string"},
{"id":"checkouts","label":"Checkouts","type":"number"}],

Sorted Copy from chart:
2011    Dog hikes in the Adirondacks : 20 trails to enjoy       9
2010    Water for elephants : a novel by Sara Gruen.    9
2010    The Eighth International Symposium on Environmenta      9
2010    Streams : their ecology and life by Colbert.E. Cu       8
2010    Introduction to permaculture by Bill Mollison wit       8
2010    Negotiation by Roy J. Lewicki, Bruce Barry, David       8
2010    Amuse-bouche : little bites that delight before th      8
2010    Billy Joe Tatum's Wild foods cookbook and field gu      8
2008    About wine by J. Patrick Henderson, Dellie Rex. 36
2011    The help by Kathryn Stockett.   18
2009    Twilight by Stephenie Meyer.    16
2011    Research design : qualitative, quantitative, and m      14
2009    Lies my teacher told me : everything your American      14
2009    Marked : a house of night novel |c P.C. Cast and        14
2008    Plows, plagues, and petroleum : how humans took co      14
2010    How the other half lives; studies among the teneme      13


Any idea how to fix this? Am I overlooking something?
Thanks,
Mike

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