Robin Newberry
> As an easy way to group accidents by year, the data has a field with
> simply the year of the accident. Unfortunately, they've chosen to
> enter 2 date years, rather than 4 date years. This presents 2
> problems:
>
> 1) 9999 is sometimes entered as shorthand for "date unknown"
replace year = "" if year == "9999"
Nick
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