\begin{figure}[!th]
\begin{center}
{\scriptsize
\begin{tabular}{|r|c|c|c|}\hline
\multicolumn{4}{|c|}{China}\\\hline
& 25\% & Median & 75\% \\\hline

DevType	&	0	&	0	&	0\\
PDR-AFP&	0.1	&	0.1	&	0.2\\
NPDU-UFP&	0.1	&	0.1	&	0.2\\
PDR-AFP	&	0.1	&	0.1	&	0.2\\
PDR-UFP	&	0.1	&	0.1	&	0.2\\
Enquiry	&	1	&	1	&	2.5\\
Input	&	1	&	1	&	4\\
Output	&	1	&	1	&	4\\
Resource	&	0.5	&	1	&	1\\
Duration&	0.5	&	1	&	1\\
Interface&	1	&	2	&	5\\
NAFP	&	1	&	2	&	6\\
Added	&	1	&	2	&	7\\
Changed	&	1	&	2	&	4\\
Deletec	&	1	&	2	&	7\\
File	&	1	&	2	&	5.5\\
\hline
\multicolumn{4}{|c|}{Kemerer}\\\hline
& 25\% & Median & 75\% \\\hline
Duration&	1	&	2	&	3\\
Hardware&	1	&	1	&	1\\
Language&	0.5	&	1	&	1\\
KSLOC	&	2	&	12.3	&	35\\
RAWFP	&	21	&	124	&	170\\
AdjFP	&	34.7	&	130	&	182\\
\hline
%\multicolumn{4}{|c|}{Telecom}\\\hline
%Feature & 25\% & Median & 75\% \\\hline
%Changes	&	6	&	18	&	22\\
%Files	&	4	&	13	&	20\\\hline
%\multicolumn{4}{|c|}{Miyazaki94}\\\hline
%Feature & 25\% & Median & 75\% \\\hline
%KLOC	&	0.9	&	1.8	&	4.15\\
%SCRN	&	1	&	2	&	2.5\\
%FORM	&	1	&	1	&	2.5\\
%FILE	&	1	&	2	&	3\\
%ESCRN	&	5	&	14	&	48\\
%EFORM	&	7	&	18	&	37\\
%EFILE	&	14	&	33	&	68.5\\\hline
\multicolumn{4}{|c|}{Finnish}\\\hline
& 25\% & Median & 75\% \\\hline

lnsize	&	0.03	&	0.05	&	0.115\\
prod	&	0.183	&	0.428	&	0.874\\
at	&	1	&	1	&	1\\
co	&	1	&	1	&	1\\
hw	&	0.5	&	1	&	1\\
FP	&	14	&	28	&	64\\
\hline
\end{tabular}}
\end{center}
\caption{Quartiles demonstrating the ranked difference between each unique feature value.
To generate this data, each column of data in each data set was sorted, and duplicates were removed.
The difference between neighboring values in each column was then recorded and sorted.
The sorted values were then reported in terms of the 25,50,75-th percentile.
Within each dataset, rows were sorted on the median values. Data sets can be found at http://promisedata.org/data. }\label{fig:delta-ranges}
\end{figure}
