Houston Comets biggest year-to-year improvement/decline
based on regular season win percentage:

                            Change in 
                              win %
Improvement: 1997 -> 1998     0.257   (0.643 -> 0.900)
Decline:     2000 -> 2001    -0.250   (0.844 -> 0.594)
Last Year:   2006 -> 2007    -0.147   (0.529 -> 0.382)