Number of measurements available in each month during the year of 1997-2002

Location Month 1997 1998 1999 2000 2001 2002
ZION1 1 0 0 0 0 16 9
ZION1 2 0 0 0 0 9 10
ZION1 3 0 0 0 2 16 10
ZION1 4 0 0 0 9 17 10
ZION1 5 0 0 0 9 19 10
ZION1 6 0 0 0 8 17 7
ZION1 7 0 0 0 9 15 11
ZION1 8 0 0 0 6 18 9
ZION1 9 0 0 0 10 19 9
ZION1 10 0 0 0 10 10 10
ZION1 11 0 0 0 10 12 10
ZION1 12 0 0 0 9 11 8