19960127
       19840114      72.7
       19840115      74.8
       19840116      73.8
       19840117      70.2
       19840131      79.4
       19870106      70.4
       19870115      76.0
       19880117      70.1
       19880120      70.5
       19880122      72.6
       19880126      74.5
       19880130      76.3
       19890120      81.7
       19900124      72.2
       19930101      73.8
       19930115      74.2
       19930129      70.5
       19960127     100.0
       19980101      73.2
       19980106      73.8
       19980128      73.3
       20000114      73.8
       20010116      70.5
       20010119      77.8
       20060117      75.0
       20060121      76.5