Miami Dolphins : 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      0      2      4      0      0     53.5      54    47     0
 2010s:    10      0      1      5      4      0     43.8      70    90     0
 2000s:    10      0      4      3      2      1     49.4      79    81     0
 1990s:    10      0      4      6      0      0     59.4      95    65     0
 1980s:    10      1      4      4      1      0     62.2      94    57     1
 1970s:    10      2      7      1      0      0     72.6     104    39     1
 1960s:     4      0      0      0      4      0     28.6      15    39     2
Totals:    60      3     22     23     11      1     55.0     511   418     4


Playoff appearances per decade

                Super  Yrs in
                 Bowl   Super Conf.  Conf.  In
          Yrs.   Wins   Bowl  Finals Semis  Playoffs
 2020s:     6      0      0      0      0      2
 2010s:    10      0      0      0      0      1
 2000s:    10      0      0      0      1      3
 1990s:    10      0      0      1      5      7
 1980s:    10      0      2      3      5      5
 1970s:    10      2      3      3      6      7
 1960s:     4      0      0      0      0      0
Totals:    60      2      5      7     17     25