
\documentclass[border=5pt,multi=true]{standalone}
\usepackage{standalone}
\usepackage{ifthen}
\usepackage{microtype}
\usepackage{lineno}
\usepackage{xspace}
\usepackage{caption}
\usepackage{graphicx}
\usepackage{color}
\usepackage{colortbl}
\usepackage{amsmath}
\usepackage{amssymb}
\usepackage{amsfonts}
\usepackage{upgreek}
\usepackage{hyperref}
\usepackage{hypcap}
\usepackage{cite}
\usepackage{mciteplus}
\usepackage{multirow}
\usepackage{booktabs}
\usepackage{rotating}
\usepackage{longtable}

\begin{document}
 


\begin{tabular}{l|cc|cc} 
\hline
 & \multicolumn{2}{c|}{2011} & \multicolumn{2}{c}{2012} \\
 & $\text{BDT1}$ & $\text{BDT2}$ & $\text{BDT1}$ & $\text{BDT2}$ \\
\hline
yield & $437\pm24$ & $475\pm26$ & $883\pm34$ & $950\pm36$ \\ 
$\varepsilon_{\rm{BDT}}$ & $(62.99\pm0.07)\%$ & $(69.29\pm0.06)\%$ & $(62.33\pm0.06)\%$ & $(68.50\pm0.06)\%$ \\ 
$\varepsilon^{*}$ & \multicolumn{2}{c|}{$(1.392\pm0.003)\%$} & \multicolumn{2}{c}{$(1.339\pm0.003)\%$}\\ 
\hline
\end{tabular}
\end{document}
