Availability of 1-min Data for 2001 
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2001    JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC 
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IRT     *## ### ### #*# ### ### #*# ### ### ### ### *##
MOS     ### ### ##* ### ### ### ### ### ### ### ### ###
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  "-" - No data;    "*" - gaps;    "#" - complete;