if I have the frequency of occurance of something between 1900 and 1910

How do I set up the data to avoid getting a line for the years as well as
the frequency.

If I put iin year 1900, year 1901 on so on, then I get only one line.
However if i don't put in year in the same cell as the year, then I get two
line.

Thanks,
knut