Finches named for Darwin are evolving

How dramatically did the beaks shrink in this 2003 episode?I found one article that gave the results of the Grants' measurements from earlier episodes, but not the 2003 drought.IIRC the 1970's drought resulted in a 4% increase in beak size (with no competion from the large ground finch). And in the 1980's the beaks size dropped something like 2.5%. Was the 2003 change within that range, or more dramatic?Thanks---IGIT