20040115
       19800112      72.8
       19800113      73.5
       19830121      71.5
       19850109      84.6
       19850118      71.6
       19850119      73.1
       19850128      71.3
       19860106      76.2
       19880101      75.6
       19880110      70.8
       19920113      74.9
       19930121      70.6
       19940104      73.5
       20040112      72.2
       20040113      79.1
       20040114      79.0
       20040115     100.0
       20040116      85.5
       20040123      72.8
       20080131      71.0
       20090105      70.1