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

Location Month 1997 1998 1999 2000 2001 2002
THRO1 1 0 0 0 9 11 6
THRO1 2 0 0 0 8 6 9
THRO1 3 0 0 0 9 10 10
THRO1 4 0 0 0 9 10 7
THRO1 5 0 0 0 7 11 10
THRO1 6 0 0 0 7 10 4
THRO1 7 0 0 0 7 10 7
THRO1 8 0 0 0 8 10 4
THRO1 9 0 0 0 0 3 10
THRO1 10 0 0 0 9 10 10
THRO1 11 0 0 0 10 10 10
THRO1 12 0 0 4 9 9 10