Export the whole column (all entries) as a list of years?
One way would be to export your library as a CSV, then copy only that column in Excel or similar software. (Then you could run statistical analysis, like looking at how many items are cited from each year, which is I'm guessing why you want to do this?)
One way would be to export your library as a CSV, then copy only that column in Excel or similar software. (Then you could run statistical analysis, like looking at how many items are cited from each year, which is I'm guessing why you want to do this?)