Percent of days reporting any data...
            apn   chi   ken   mcy   mil   mkg   shv  tol2 
 2001:      100    99   100    NA    55    98    NA    NA
 2002:      100    93    98    72    99   100    NA    NA
 2003:      100   100    98    83   100    96    NA    NA
 2004:      100    99   100    99   100    82   100    84
 2005:       87   100    92    99    99    98    98    96
 2006:       70    47   100    99    99   100   100    98
 2007:       53   100   100    98    97   100   100    85
 2008:       78    65    NA    89   100    98    88    98

Percent of hours reporting wind data...
            apn   chi   ken   mcy   mil   mkg   shv  tol2 
 2001:       98    98    98    NA    50    97    NA    NA
 2002:       99    91    96    67    98    99    NA    NA
 2003:       99    99    97    76    99    94    NA    NA
 2004:       99    98    90    98    99    80    98    82
 2005:       86    98    91    88    97    95    97    95
 2006:       70    45   100    94    97   100   100    97
 2007:       52    99    99    96    87    99    95    83
 2008:       77    64    NA    87    76    97    79    81