Here is each month in 1987 with its corresponding import values. I want to create a new data set that lists the total imports for each year from 1987 to 2015. Month Imports January 1987 30,798.5 February 1987 29,810.3 March 1987 32,464.3 April 1987 32,291.1 May 1987 33,170.0 June 1987 35,358.0 July 1987 35,809.9 August 1987 33,826.2 September 1987 33,667.5 October 1987 38,075.6 November 1987 35,210.9 December 1987 35,758.7 TOTAL 1987 406,241.0
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