San Antonio Spurs biggest year-to-year improvement/decline

Based on regular season win percentage:

                            Change in 
                              win %
Improvement: 1997 -> 1998     0.439   (0.244 -> 0.683)
Decline:     1996 -> 1997    -0.476   (0.720 -> 0.244)
Last Year:   2025 -> 2026     0.341   (0.415 -> 0.756)