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

Location Month 1997 1998 1999 2000 2001 2002
SNPA1 1 7 4 1 0 10 10
SNPA1 2 7 4 7 0 9 10
SNPA1 3 5 6 8 9 10 10
SNPA1 4 9 4 6 9 6 10
SNPA1 5 6 6 9 9 11 10
SNPA1 6 3 6 5 8 10 9
SNPA1 7 8 5 6 9 10 11
SNPA1 8 9 5 0 9 10 10
SNPA1 9 8 8 0 10 10 9
SNPA1 10 8 8 0 10 11 9
SNPA1 11 8 6 0 8 10 10
SNPA1 12 6 7 0 10 10 11