begin{tikzpicture}
centering
begin{axis}[
    ymin=0, ymax=8000,
    minor y tick num = 2,
    axis background/.style={fill=gray!5},
    area style,
    ]
addplot+ [ybar interval,mark=no, fill={rgb:red,0;green,47;blue,135},draw=gray!5] plot coordinates { (0, 32) (5, 1228) (10, 6658) (15, 5060) (20, 1786) (25, 684) (30, 404) (35, 228) (40, 165) (45, 119) (50, 72)};
end{axis}
end{tikzpicture}