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

Location Month 1997 1998 1999 2000 2001 2002
NOCA1 1 0 0 0 0 9 9
NOCA1 2 0 0 0 0 9 10
NOCA1 3 0 0 0 6 10 10
NOCA1 4 0 0 0 9 8 10
NOCA1 5 0 0 0 9 8 10
NOCA1 6 0 0 0 8 10 10
NOCA1 7 0 0 0 9 10 11
NOCA1 8 0 0 0 7 9 8
NOCA1 9 0 0 0 9 7 10
NOCA1 10 0 0 0 9 10 10
NOCA1 11 0 0 0 9 10 10
NOCA1 12 0 0 0 6 10 11