\documentclass[border=5]{standalone}
\usepackage[svgnames]{xcolor}
\usepackage{tikz}
\usetikzlibrary{matrix}
\newcommand*\head[1]{\textbf{#1}}
\usepackage{amssymb}% provides \blacktriangle, etc.
\newcommand*\up{\textcolor{ForestGreen}{$\blacktriangle$}}
\newcommand*\down{\textcolor{DarkRed}{$\blacktriangledown$}}
\newcommand*{\blackrectangle}{\rule{1.2ex}{1.2ex}}
\newcommand*\const{\textcolor{darkgray}{\blackrectangle}}

% The table environment: hard-coded for 4 columns
\newenvironment{matrixtable}[4]{%
  \begin{tikzpicture}[matrix of nodes/.style = {
    execute at begin cell = \node\bgroup\strut,
    execute at end cell = \egroup;}]
  \matrix (m) [matrix of nodes,
    top color = blue!20,
    bottom color = blue!80,
    draw = white,
    nodes = {draw, top color = blue!10, bottom color = blue!35,
    draw, inner sep = 2pt, minimum height = 3.1ex},
    column sep = 1ex,
    row sep = 0.6ex,
    inner sep = 2ex,
    rounded corners,
    column 1/.style = {minimum width=#1},
    column 2/.style = {minimum width=#2},
    column 3/.style = {minimum width=#3},
    column 4/.style = {minimum width=#4}]}%
{;\end{tikzpicture}}

\begin{document}

\begin{matrixtable}{1.2cm}{2.4cm}{1.2cm}{0.6cm}{%
  \head{Rank}   & \head{Distribution} & \head{Hits} & \\
  1 & Ubuntu    & 2114 & \down  \\
  2 & Fedora    & 1451 & \up    \\
  3 & Mint      & 1297 & \const \\
  4 & OpenSUSE  & 1228 & \up    \\
  5 & Debian    & 910  & \down  \\
  6 & Mandriva  & 907  & \up    \\
  7 & PCLinuxOS & 764  & \up    \\
  8 & Puppy     & 738  & \up    \\
  9 & Sabayon   & 671  & \up    \\
 10 & Arch      & 625  & \down  \\ }%
\end{matrixtable}
\end{document}