I need someone to explain to me how to calculate Tukey and LSD for a data set. I am conducting Tukey and LSD at every level of time.

1-2 Years               3-5 Years               7-10 Years

Postencephalitic               71.7                     62.25                    50.00

Postmeningitic                 82.0                     79.25                    60.0

Postoperative Control     71.75                    81.75                    89.75