January February
0.001
0.010
0.000
0.008 0.001
0.006 0.002
0.003
0.004 0.004
0.002 0.005
0.006
0.000
0 5 10 15 20 25 30 0 5 10 15 20 25
March April
0.004
0.003 0.003
0.002
0.002
0.001
0.001
0.000
0.000 0.001
0.001 0.002
0.003
0 5 10 15 20 25 30 0 5 10 15 20 25 30
May June
0.003 0.000
0.002 0.001
0.001 0.002
0.003
0.000
0.004
0.001
0.005
0.002
0.006
0 5 10 15 20 25 30 0 5 10 15 20 25 30
July August
0.001 0.004
0.000 0.003
0.001 0.002
0.002 0.001
0.003 0.000
0.004 0.001
0.005
0.002
0.006
0.003
0 5 10 15 20 25 30 0 5 10 15 20 25 30
September October
0.002 0.001
0.000
0.000
0.002
0.004 0.001
0.006 0.002
0.008
0.003
0 5 10 15 20 25 30 0 5 10 15 20 25 30
November December
0.005 0.000
0.004 0.002
0.003 0.004
0.002 0.006
0.001 0.008
0.000 0.010
0.001 0.012
0 5 10 15 20 25 30 0 5 10 15 20 25 30