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

Location Month 1997 1998 1999 2000 2001 2002
HOOV1 1 0 0 0 0 0 7
HOOV1 2 0 0 0 0 0 10
HOOV1 3 0 0 0 0 0 10
HOOV1 4 0 0 0 0 0 10
HOOV1 5 0 0 0 0 0 10
HOOV1 6 0 0 0 0 0 10
HOOV1 7 0 0 0 0 0 10
HOOV1 8 0 0 0 0 9 6
HOOV1 9 0 0 0 0 10 10
HOOV1 10 0 0 0 0 9 10
HOOV1 11 0 0 0 0 8 8
HOOV1 12 0 0 0 0 7 11