Exponential progress

I ran regularly (but not fanatically) before my 1993 accident, but then let it go for many, many years until resuming in 2006. That summer I did my first post-accident road race, a 5K, and followed it with several in 2006 and 2007. In June 2008 I moved up to a 10K (6.2 miles), and in June 2009 I'm hoping to run a half-marathon (13.1 miles). I've given thought to doing a full marathon in 2010 - I did them in 1984 and 1992, but figured that my marathoning days were now past. But maybe not ... we'll see.