19860106       192
  19800112        12    79.8
  19800113        13    71.5
  19800122        22    68.6
  19800126        26    61.4
  19810123        54    67.6
  19820103        65    65.8
  19820104        66    64.6
  19820112        74    76.6
  19820124        86    60.3
  19820125        87    64.9
  19820126        88    64.1
  19830106        99    64.5
  19830107       100    63.8
  19830121       114    66.3
  19850108       163    61.1
  19850109       164    76.1
  19850117       172    71.0
  19850118       173    72.7
  19850119       174    76.6
  19850120       175    74.8
  19850128       183    67.2
  19850129       184    61.2
  19850130       185    60.5
  19860106       192   100.0
  19860107       193    65.0
  19870118       235    63.6
  19880101       249    66.9
  19880109       257    65.0
  19880110       258    76.7
  19910105       346    62.4
  19910114       355    64.7
  19920117       389    72.9
  19920118       390    65.1
  19920122       394    71.9
  19920124       396    61.6
  19930121       424    67.7
  19940104       438    82.0
  19960101       497    67.8
  19960102       498    64.7
  19970102       529    62.7
  19970103       530    82.3
  19970104       531    67.1
  19980109       567    73.3
  19990103       592    70.2
  20000127       647    72.1
  20020119       701    73.0
  20030107       720    68.0
  20030117       730    68.5
  20030129       742    61.3
  20030130       743    61.0
  20040102       746    74.8
  20040113       757    63.4
  20040115       759    76.2
  20040116       760    62.8
  20040123       767    69.0
  20080107       875    64.6
  20080121       889    63.5
  20080130       898    62.8
  20080131       899    60.2
  20090105       904    62.3