New England Patriots : 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      0      3      2      0     46.5      47    54     0
 2010s:    10      4      6      0      0      0     78.1     125    35     0
 2000s:    10      3      5      1      1      0     70.0     112    48     0
 1990s:    10      0      3      2      3      2     42.5      68    92     0
 1980s:    10      0      3      5      1      1     51.3      78    74     0
 1970s:    10      0      3      3      3      1     45.8      66    78     0
 1960s:     4      0      1      0      3      0     36.6      19    34     3
Totals:    60      8     21     14     13      4     55.4     515   415     3


Playoff appearances per decade

                Super  Yrs in
                 Bowl   Super Conf.  Conf.  In
          Yrs.   Wins   Bowl  Finals Semis  Playoffs
 2020s:     6      0      1      1      1      2
 2010s:    10      3      5      8      9     10
 2000s:    10      3      4      5      6      7
 1990s:    10      0      1      1      2      4
 1980s:    10      0      1      1      2      3
 1970s:    10      0      0      0      2      2
 1960s:     4      0      0      0      0      0
Totals:    60      6     12     16     22     28