Graphing a paper's number of citations by year
If you have access to Scopus (Web of Science also works, I presume) you can show the publications citing this paper in search format. Using the filters on that search page, you can retrieve the data you're looking for quite easily (year filter > show more > show all). In this case, that shows the following:


Problem with this, of course, is that Scopus only shows the citations it has in its database (410 documents).