Help me solve for R

Annual high temperatures in a certain location have been tracked for several years. Let X represent the year and Y the high temperature. Based on the data shown below, calculate the correlation coefficient (to three decimal places) between X and Y. Use your calculator! X y 2 18 3 17.45 4 16.6 5 18.75 6 20.5 20.95 18.7 9 19.15 10 22.2 11 22.95 12 22.1 13 23.85 14 23.6 15 22.85 16 24.7