(74.7) (75.4) (76.1) (77.2) (78.4) (79) (78.3) (77.4) (75.9) (73.9) (76.2) Average 17.5 17.3 17.7 18 18.6 19.1 19.7 19.9 19.6 19.4 18.7 17.9 18.6 Average rainfall 15.9 24.8 34.6 70.3 151.4 106.1 63.4 97 135.6 115.1 55 25.4 894.6