This post originally appeared on Orphan Road.

Several months ago I compiled some census data regarding WA, King County, and Seattle and concluded that the Growth Management Act is broken.  Since then I’ve been pointing to this data from all over the Web.  Today, someone helped me realize that my numbers may be misleading.  They are correct, but too granular, looking only at census data (every 10 years).  Looking at year-by-year data for the last decade we get a completely different picture.

First, my original chart:

Now, let’s zoop in on those last 10 years and look at annual data:

Ok, that graph was boring.  That’s because populations don’t change very quickly.  However, let’s look at the percentage change each year:

Look at that.  Starting in 2006 WA population growth began decelerating.  But Seattle has been acelerating since 2005. 

What does that mean for growth management?  I don’t know.  The GMA has been around for 2 decades and it would be strange for it to just start working in 2005.  This probably has more to do with the economy than anything else.  I ended my piece claiming “our only hope of keeping Washington green is to make that Seattle line match the rise of the WA line.”  We’re still a ways from having that happen.  But at least we’ve started heading in the right direction.