Seattle Seahawks : 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      1      1      4      0      0     60.4      61    40     0
 2010s:    10      1      6      3      0      0     62.8     100    59     1
 2000s:    10      1      2      4      3      0     51.3      82    78     0
 1990s:    10      0      0      7      2      1     43.8      70    90     0
 1980s:    10      0      3      5      2      0     51.3      78    74     0
 1970s:     4      0      0      2      1      1     41.7      25    35     0
Totals:    50      3     12     25      8      2     52.5     416   376     1


Playoff appearances per decade

                Super  Yrs in
                 Bowl   Super Conf.  Conf.  In
          Yrs.   Wins   Bowl  Finals Semis  Playoffs
 2020s:     6      1      1      1      1      3
 2010s:    10      1      2      2      7      8
 2000s:    10      0      1      1      3      5
 1990s:    10      0      0      0      0      1
 1980s:    10      0      0      1      3      4
 1970s:     4      0      0      0      0      0
Totals:    50      2      4      5     14     21