I would like to add an additional row (Vintage) where there is a gap in the year that has a count value of 0, so that the data is chronological without gaps. Ideally, I would like to do this in every instance the gap potentially would occur.
Currently the data reads:
1994 - 2
1996 - 5
1997 - 4
Goal:
1994 - 2
1995 - 0
1996 - 5
1997 - 4

Any solutions would be appreciated!