Number of measurements available in each month during 2001-2004
Location
Month
2000
2001
2002
2003
2004
BRET1
1
1
9
9
10
BRET1
2
3
10
9
9
BRET1
3
7
10
11
11
BRET1
4
6
5
10
10
BRET1
5
7
3
10
6
BRET1
6
9
2
10
9
BRET1
7
10
3
10
9
BRET1
8
10
10
11
11
BRET1
9
10
8
2
2
BRET1
10
8
10
BRET1
11
10
10
4
BRET1
12
10
11
10