JAN	1988 0.563 C	1998 0.664 C	mean 12.0 (1880-1998)
FEB	1995 0.603 C	1998 0.858 C	mean 12.2	"
MAR 	1990 0.650 C	1998 0.707 C	mean 12.7	"
APR	1991 0.471 C	1998 0.772 C	mean 13.7	"
MAY	1997 0.423 C	1998 0.678 C	mean 14.8	"
JUN	1997 0.522 C	1998 0.631 C	mean 15.5	"
JUL	1997 0.466 C	1998 0.711 C	mean 15.8	"