New York Knickerbockers biggest year-to-year improvement/decline

Based on regular season win percentage:

                            Change in 
                              win %
Improvement: 2020 -> 2021     0.251   (0.318 -> 0.569)
Decline:     1984 -> 1985    -0.280   (0.573 -> 0.293)
Last Year:   2022 -> 2023     0.122   (0.451 -> 0.573)