Tim Heaton, Stephen Bahr, and Cardell Jacobson provide summary of LDS divorce rates from different sources.
Tim Heaton, Stephen Bahr, and Cardell Jacobson, A Statistical Profile Of Mormons: Health, Wealth, And Social Life (Lewiston, NY: Edwin Mellon Press, 2005), 104-105
Taking an average of the three data sets suggests that the LDS divorce rate is three-fourths as high as the national rate in the 1990s.