Within 1 Minute
1 to 10 minutes
10 minutes to 1 hour
1 to 10 hours
10 hours to 4 days
4 to 40 days
40 days to 1 year
1 to 10 years
10 to 100 years
each further 10 x
4
6
8
10
12
14
16
18
20
+2
0
-1
-2
-3
-4
-5
-6
-7
-8