Pittsburgh Pirates 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      0      0      7      1      0     42.7     552   742
 1990s:    10      0      1      9      0      0     49.8     774   779
 1980s:    10      0      0      8      2      0     47.0     732   825
 1970s:    10      0      2      8      0      0     56.9     916   695
 1960s:    10      0      1      9      0      0     52.9     848   755
 1950s:    10      0      0      5      5      0     40.0     616   923
 1940s:    10      0      0     10      0      0     49.3     756   776
 1930s:    10      0      0     10      0      0     53.1     812   718
 1920s:    10      0      2      8      0      0     57.2     877   656
 1910s:    10      0      1      8      1      0     49.5     736   751
 1900s:     7      0      5      2      0      0     62.9     666   393
Totals:   105      0     12     84      9      0     50.8    8285  8013


Playoff appearances per decade:

                   World   Yrs in   League    Div.
                  Series    World   Champ.   Champ.     In
          Yrs.     Wins    Series   Series   Series  Playoffs
 2000s:     8        0        0        0        0        0
 1990s:    10        0        0        3        0        3
 1980s:    10        0        0        0        0        0
 1970s:    10        2        2        6        0        6
 1960s:    10        1        1        0        0        1
 1950s:    10        0        0        0        0        0
 1940s:    10        0        0        0        0        0
 1930s:    10        0        0        0        0        0
 1920s:    10        1        2        0        0        2
 1910s:    10        0        0        0        0        0
 1900s:     7        1        2        0        0        2
Totals:   105        5        7        9        0       14