Number of measurements available in each month during 2000-2002

Location Month 2000 2001 2002 2003 2004
CHAS1 1 9 11 9    
CHAS1 2 8 9 8    
CHAS1 3 9 10 10    
CHAS1 4 9 10 8    
CHAS1 5 6 11 10    
CHAS1 6 8 10 10    
CHAS1 7 9 10 10    
CHAS1 8 6 10 8    
CHAS1 9 10 10 10    
CHAS1 10 6 11 10    
CHAS1 11 10 8 10    
CHAS1 12 10 10 11