\begin{table}%T2
 \caption{\label{tb2}Angular rates of rotation estimated for~4~different
sets of HCRF~proper motions referred to the ICRF. $X, Y, Z$ denote the
components of solar motion in equatorial coordinates, "$P$'' is Oort's constant
related to differential galactic
rotation, "$d$'' stands for stellar distance, "elim'' for elimination of residuals
and "no'' refers to the number of HCRF stars.}
%\centering
\par
 \begin{tabular}{lrrrr}    
 \hline \hline    
     ~      & \multicolumn{1}{c}{Case 1} & \multicolumn{1}{c}{Case 2}  &
              \multicolumn{1}{c}{Case 3} & \multicolumn{1}{c}{Case 4}  \\  
   \hline   
     ~      & \multicolumn{1}{c}{$d >100$ pc}       & \multicolumn{1}{c}{$d > 100$ pc} &
              \multicolumn{1}{c}{$d > 100$ pc}      & \multicolumn{1}{c}{$d > 100$ pc}   \\
     ~      & \multicolumn{1}{c}{elim: none}        & \multicolumn{1}{c}{elim: $>$10 mas/yr} &
              \multicolumn{1}{c}{elim: $>$8 mas/yr} & \multicolumn{1}{c}{elim: $>$5 mas/yr} \\
     ~      & \multicolumn{1}{c}{no: 78741}         & \multicolumn{1}{c}{no: 28084} &
              \multicolumn{1}{c}{no: 22204}         & \multicolumn{1}{c}{no: 12750}  \\  
 \hline \\[-3mm]
       ~$X$ ~~[km~s$^{-1}$]      &   $1.71 \pm 0.10$ &   $1.37 \pm 0.04$~~~~&   $1.39 \pm 0.04$~~~~&   $1.47 \pm 0.04$~~~~\\
       ~$Y$ ~~[km~s$^{-1}$]      & $-17.57 \pm 0.11$ & $-17.52 \pm 0.05$~~~~& $-17.44 \pm 0.05$~~~~& $-17.45 \pm 0.04$~~~~\\
       ~$Z$ ~~[km~s$^{-1}$]      &  $10.43 \pm 0.10$ &   $9.00 \pm 0.05$~~~~&   $9.25 \pm 0.04$~~~~&   $9.72 \pm 0.04$~~~~\\
       ~$\omega_x$ [mas/yr]&   $2.09 \pm 0.10$ &   $2.23 \pm 0.03$~~~~&   $2.25 \pm 0.03$~~~~&   $2.27 \pm 0.03$~~~~\\
       ~$\omega_y$ [mas/yr]&   $0.83 \pm 0.10$ &   $0.64 \pm 0.03$~~~~&   $0.62 \pm 0.03$~~~~&   $0.63 \pm 0.03$~~~~\\
       ~$\omega_z$ [mas/yr]&  $-1.82 \pm 0.13$ &  $-1.91 \pm 0.04$~~~~&  $-1.86 \pm 0.04$~~~~&  $-1.78 \pm 0.03$~~~~\\
       ~$P$ ~~[mas/yr]    &   $2.82 \pm 0.14$ &   $2.61 \pm 0.04$~~~~&   $2.56 \pm 0.04$~~~~&   $2.68 \pm 0.03$~~~~\\
      \rule[-2mm]{0mm}{6mm}
        %\raisebox{1.5mm}[-1.5mm]
{Error of unit} & \multicolumn{1}{c}{~30.9} & \multicolumn{1}{c}{~6.0} &
                                                  \multicolumn{1}{c}{~5.0}  & \multicolumn{1}{c}{~3.4}     \\[-1mm]
                                \raisebox{1.5mm}[-1.5mm]{~~weight} 
				        & \multicolumn{1}{c}{~}     & \multicolumn{1}{c}{~}    &
                                                  \multicolumn{1}{c}{~}     & \multicolumn{1}{c}{~}       \\  
   \hline   
   \end{tabular}
 \end{table}