Buffalo Bills : win % / playoff appearances per decade

The number of seasons with win % in the following ranges:
                                                    Decade
          Yrs.    80%+ 60-79% 40-59% 20-39% 0-19%    Ave.    Wins Losses
 2020s:     6      2      4      0      0      0     73.0      73    27     0
 2010s:    10      0      1      4      5      0     44.4      71    89     0
 2000s:    10      0      0      6      3      1     41.3      66    94     0
 1990s:    10      2      6      1      1      0     64.4     103    57     0
 1980s:    10      0      3      4      1      2     45.4      69    83     0
 1970s:    10      0      2      2      4      2     36.1      51    91     2
 1960s:     4      0      1      0      2      1     33.9      18    36     2
Totals:    60      4     17     17     16      6     48.6     451   477     4


Playoff appearances per decade

                Super  Yrs in
                 Bowl   Super Conf.  Conf.  In
          Yrs.   Wins   Bowl  Finals Semis  Playoffs
 2020s:     6      0      0      2      6      6
 2010s:    10      0      0      0      0      2
 2000s:    10      0      0      0      0      0
 1990s:    10      0      4      4      5      8
 1980s:    10      0      0      1      4      4
 1970s:    10      0      0      0      1      1
 1960s:     4      0      0      1      1      1
Totals:    60      0      4      8     17     22