So, I am trying to insert the rainfall spreadsheet, but everytime I try I lose the format and it is a bit hard to "get it".
Anyway, overall, I guess 2006 with 2125mm hasn't been that much drier than 2005 which gave us 2573mm. But the distribution was quite different, which is where the spreadsheet would be instructive.
Basically summer was much drier. Spring and Fall both had some fairly heavy falls which brought the yearly totals up, but at both ends of the year we did have longer periods of no rain than in the previous year, where the falls were more evenly spread out.
Just to show the marked difference between summer 05 and 06, I will manually give you the breakdown;

Jun 05 - 197mm. Jun 06 - 59mm
Jul 05 - 239mm, Jul 06 - 97mm
Aug 05 - 137mm, Aug 06 - 76mm
Sep 05 - 490mm, Sep 06 - 124mm

In other words, summer 05 had 1063 mm, summer 06 had 356mm...

In October it starts to balance out, and November and December have actually been somewhat wetter this year...

Given that conditions are likely to get more and more extreme, it would be great to put in more storages, both tanks and ponds. A big "turkeys nest" up there on the ridge which we could fill with the solar pump in wet times and via roof catchment from the eventual structure that will go up there, and more swales obviously. I know I am repeating myself, that you are well aware of what I am saying...