Table 2b: The frequency distribution of $\Delta \delta $.
    $\vert\Delta\delta\vert$(0''.01) 00-7.5 7.5-15 15-22.5 22.5-30 30-37.5 37.5-45 45-52.5   >52.5
Hipp N 2204 1031 386 189 73 49 20 0
  % 55.7 26.1 9.8 4.8 1.8 1.2 0.5 0
CAMC4 N 81 53 61 42 29 15 17 31
  % 24.4 16.0 18.4 12.7 8.7 4.5 5.1 9.3
From Tables 2a and 2b, we can see that the position corrections for about $97.7\%$ and $96.4\%$
of the Hipparcos stars are less than 20 ms in $\Delta \alpha $ and 0.30'' in  $\Delta \delta $ respectively.

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