Number of measurements available in each month during 2000-2004

Location Month 2000 2001 2002 2003 2004
ROMA1 1 9 11 9 10 11
ROMA1 2 8 9 10 9 9
ROMA1 3 7 10 10 11 11
ROMA1 4 5 10 10 10 10
ROMA1 5 5 11 10 8 9
ROMA1 6 7 10 10 10 7
ROMA1 7 9 9 11 10 10
ROMA1 8 8 10 9 10 11
ROMA1 9 9 10 10 10 10
ROMA1 10 10 11 8 10 10
ROMA1 11 10 10 10 8 10
ROMA1 12 10 10 11 9 10