How can I reorder this table so the column B data represents the month prior?

I have the following table: Month Value September 12 October 78 November 88 December 132 I want to display the value of October in September, November in October and so on. The final output should look like this: Month Value September 78 October 88 November 132 December Value of January How can this be achieved? Please help. Thanks in advance.