I need to create similar table using LaTeX:

I have tried to use tabular and \multicolumn, but every time I get something wrong.
Could someone help me?
\documentclass{article}
\begin{document}
\begin{tabular}{ | l | l | l | l | l | l | l | l | l | l | l | l | l | l | l | l | }
\hline
\ & \ & \ & \ & \ & \ & \ & \ & \ & \ & \ & \ & \ & \ & \ & \ \\ \hline
\ & \ & \ & \ & \ & \ & \ & \ & \ & \ & \ & \ & \ & \ & \ & \ \\ \hline
\ & \ & \ & \ & \ & \ & \ & \ & \ & \ & \ & \ & \ & \ & \ & \ \\ \hline
NAME & L & & & M & & & N & & & O & & & K & & \\ \hline
& L1 & L2 & L3 & M1 & M2 & M3 & N1 & N2 & N3 & O1 & O2 & O3 & K1 & K2 & K3 \\ \hline
A & 31 & 11 & 22 & 5 & 1 & 5 & 5 & 1 & 5 & 2 & 0 & 0 & 4 & 2 & 0 \\ \hline
B & 11 & 10 & 4 & 23 & 6 & NA & 8 & 0 & 2 & 1 & 0 & 1 & 1 & 1 & 1 \\ \hline
C & 7 & 4 & 2 & 3 & 1 & NA & 2 & 3 & 1 & 2 & 3 & 1 & 4 & 2 & 1 \\ \hline
D & 21 & 8 & 9 & 29 & 3 & 15 & 22 & 3 & 2 & 6 & 0 & 0 & 3 & 4 & 0 \\ \hline
\end{tabular}
\end{document}


\cline, and\multirow. – perror Apr 25 '14 at 15:32\multicolumnand\multirowcombination. Here are a few examples: Table with multiple merging; Formatting of Tables in LaTeX, using\multirowand\multicolumntogether; Combine 4 cells in a table – Werner Apr 25 '14 at 15:35