Chicago Bears : biggest year-to-year improvement/decline

Based on regular season win percentage:

                            Change in 
                              win %
Improvement: 2000 -> 2001     0.500   (0.313 -> 0.813)
Decline:     2001 -> 2002    -0.563   (0.813 -> 0.250)
Last Year:   2024 -> 2025     0.353   (0.294 -> 0.647)