Relationship between sunspot number and total annual precipitation at Izana (Tenerife): Maximum precipitation prediction with three year lagged sunspots?

A possible relationship between sunspot number and total annual precipitation from the Izana Observatory has been found. The annual precipitation period ranges from 1916 to 1998, thus including nearly eight 11-year solar cycles. When points of total precipitation for a given year at Izana are plotted on the ordinate axis versus the yearly sunspot number on the abcisa axis three years back from the precipitation one, nearly all of them lie in the lower left hand corner of the diagram. This seems to indicate a relationship between the above mentioned variables. If this relationship is confirmed it would permit the prediction of a maximum annual precipitation at Izana three years in advance.