\begin{tabular}{rrrr}
  \hline
  Method & 
  Compression Ratio & 
  Compression Time & 
  Decompression Time \\
  \hline
  bib & 2.20 & 18.49 & 18.49 \\
  book1 & 2.48 & 18.13 & 18.32 \\
  book2 & 2.19 & 17.83 & 18.20 \\
  geo & 4.80 & 18.41 & 18.51 \\
  news & 2.77 & 18.27 & 18.17 \\
  obj1 & 4.12 & 19.91 & 20.81 \\
  obj2 & 2.76 & 18.21 & 17.87 \\
  paper1 & 2.73 & 18.01 & 18.69 \\
  paper2 & 2.59 & 18.53 & 18.51 \\
  pic & 0.82 & 17.43 & 16.79 \\
  progc & 2.75 & 19.20 & 19.90 \\
  progl & 1.99 & 18.72 & 18.57 \\
  progp & 2.00 & 18.79 & 18.84 \\
  trans & 1.92 & 18.29 & 18.49 \\
\end{tabular}
\caption{Results for dmc-50M (sorted by file)}