Historical 1994-2008 top-25 world ranking data

I notice that these ranking wasn't updated weekly. Were these files only included the rankings updated after a tournament ended?
 
minions,

On my side I am sure I downloaded and included in files all ranking dates presented at Federation's site.

I have no any documents or rememberings about early times of ranking system, and only could guess that Federation in 1994 started to calculate rankings on monthly basis (excluding the very first "incoming"), and in the middle of 1996 converted to weekly basis.

Here are dates:
19940926
19941003
19941115
19941216
19950104
19950207
19950307
19950404
19950506
19950606
19950704
19950801
19950901
19951003
19951107
19951212
19960104
19960206
19960302
19960401
19960507
19960604
19960611
19960618
19960625
19960703
... and so on weekly
 
I see. Thanks. I checked the ranking and it looks like the ranking wouldn't update when in holiday such as New Year.
 
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