New England Patriots win percentages 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
 2000s:     8      3      3      1      1      0     71.1      91    37     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:    42      3     13     11     11      4     50.5     322   315     3


Playoff appearances per decade

                Super  Yrs in
                 Bowl   Super Conf.  Conf.  In
          Yrs.   Wins   Bowl  Finals Semis  Playoffs
 2000s:     8      3      4      5      6      6
 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:    42      3      6      7     12     15