Hello Jason,
according to the CatScan tool [1], there were:
#1: 231 OR articles in 2005 [2]
#2: 420 in 2006
#3: 471 in 2007
#4: 410 in 2008
which gives in total 1532 articles up to 2009.
It seems the CatScan has some problems with 2009, so you can always
count them up by hand.
If you wish, I can count these for specific months, so you could put
them in a diagram.
== References ==
*[1]
http://toolserver.org/~daniel/WikiSense/CategoryIntersect.php
*[2]
http://toolserver.org/~daniel/WikiSense/CategoryIntersect.php?wikilang=en&a…
Best,
Tomasz