Los Angeles Clippers biggest year-to-year improvement/decline
based on regular season win percentage:

                            Change in 
                              win %
Improvement: 1973 -> 1974     0.256   (0.256 -> 0.512)
Decline:     1986 -> 1987    -0.244   (0.390 -> 0.146)
Last Year:   2007 -> 2008    -0.208   (0.488 -> 0.280)