19850119
       19800112      70.9
       19800113      82.5
       19850109      82.4
       19850118      83.0
       19850119     100.0
       19850120      76.4
       19850128      73.4
       19850129      71.2
       19860106      76.6
       19860107      72.0
       19880101      74.8
       19910105      74.6
       19920118      78.2
       19940104      71.0
       19960101      73.3
       19970103      74.9
       20000127      70.1
       20030117      74.4
       20040113      77.3
       20040114      72.2
       20040115      73.1
       20040116      74.7