month level
ja96 578.64
fe96 578.71
mr96 578.71
ap96 578.94
my96 579.49
je96 579.92
jl96 580.15
au96 580.18
se96 580.12
oc96 580.05
no96 580.02
de96 579.95
ja97 580.02
fe96 580.12
mr97 580.35
ap97 580.54
my97 580.94
je97 581.10
jl97 581.33
au97 581.23
se97 581.10
oc97 580.77
no97 580.35
de97 580.02
ja98 579.86
fe98 579.76
mr98 579.86
ap98 580.35
my98 580.41
je98 580.38
jl98 580.31
au98 580.05
se98 579.66
oc98 579.23
no98 578.87
de98 578.61
ja99 578.31
fe99 578.35
mr99 578.22
ap99 578.25
my99 578.35
je99 578.54
jl99 578.74
au99 578.61
se99 578.22
oc99 577.89
no99 577.56
de99 577.40
ja00 577.17
fe00 577.00
mr00 577.10
ap00 577.17