Seattle SuperSonics 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      1      6      2      0     47.3     349   389
 1990s:    10      0      6      4      0      0     64.8     511   277
 1980s:    10      0      2      6      2      0     51.7     424   396
 1970s:    10      0      1      8      1      0     49.8     408   412
 1960s:     2      0      0      0      2      0     32.3      53   111
Totals:    41      0     10     24      7      0     52.4    1745  1585

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        3        3
 1990s:    10        0        1        2        5        8        8
 1980s:    10        0        0        2        4        7        7
 1970s:    10        1        2        2        4        2        4
 1960s:     2        0        0        0        0        0        0
Totals:    41        1        3        6       14       20       22