New York Knickerbockers biggest year-to-year improvement/decline
based on regular season win percentage:

                            Change in 
                              win %
Improvement: 1988 -> 1989     0.171   (0.463 -> 0.634)
Decline:     1984 -> 1985    -0.280   (0.573 -> 0.293)
Last Year:   2007 -> 2008    -0.122   (0.402 -> 0.280)