Washington Wizards 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:     9      0      0      6      3      0     43.1     318   420
 1990s:    10      0      0      3      7      0     37.6     296   492
 1980s:    10      0      0     10      0      0     48.4     397   423
 1970s:    10      0      4      6      0      0     58.9     483   337
 1960s:     8      0      1      3      4      0     40.6     262   383
Totals:    47      0      5     28     14      0     46.1    1756  2055

Per decade, the number of appearances in 
each playoff round:
                                    Yrs in    Yrs in   Yrs in
                  Finals   Yrs in   Conf.     Conf.    Round    Yrs in
          Yrs.     Wins    Finals   Finals    Semis    of 16   Playoffs
 2000s:     9        0        0        0        1        4        4
 1990s:    10        0        0        0        0        1        1
 1980s:    10        0        0        0        1        7        7
 1970s:    10        1        4        4       10        2       10
 1960s:     8        0        0        1        3        0        3
Totals:    47        1        4        5       15       14       25