Oakland Athletics 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      2      7      0      0     56.0     815   641
 1990s:    10      0      1      9      0      0     50.1     773   771
 1980s:    10      0      2      8      0      0     51.2     803   764
 1970s:    10      0      3      5      2      0     52.7     838   752
 1960s:    10      0      0      5      5      0     42.7     686   922
 1950s:    10      0      0      5      5      0     40.5     624   915
 1940s:    10      0      0      5      5      0     40.4     620   916
 1930s:    10      0      3      2      5      0     47.6     723   795
 1920s:    10      0      2      6      2      0     50.5     770   754
 1910s:    10      0      4      2      4      0     47.8     710   774
 1900s:     7      0      3      4      0      0     56.0     577   453
Totals:   106      0     20     58     28      0     48.4    7939  8457


Playoff appearances per decade:

                   World   Yrs in   League    Div.
                  Series    World   Champ.   Champ.     In
          Yrs.     Wins    Series   Series   Series  Playoffs
 2000s:     9        0        0        1        5        5
 1990s:    10        0        1        2        0        2
 1980s:    10        1        2        3        1        3
 1970s:    10        3        3        5        0        5
 1960s:    10        0        0        0        0        0
 1950s:    10        0        0        0        0        0
 1940s:    10        0        0        0        0        0
 1930s:    10        1        2        0        0        2
 1920s:    10        1        1        0        0        1
 1910s:    10        3        4        0        0        4
 1900s:     7        0        1        0        0        1
Totals:   106        9       14       11        6       23