Table 6: Clusters with the largest absolute populations of blue stragglers ( $N_{\rm BS} \geq 20$).
Cluster $\log \textup{(age)}$ $N_{\rm BS}$ Cluster $\log \textup{(age)}$ $N_{\rm BS}$
Berkeley 18 9.6 126 Berkeley 17 10.1 31
Berkeley 14 9.2 94 King 2 9.8 30
NGC 6791 9.6 75 Pismis 3 9.0 30
Berkeley 66 9.7 70 NGC 6819 9.2 29
Trumpler 5 9.6 70 Collinder 110 9.2 27
Berkeley 70 9.7 64 King 11 9.2 27
Ruprecht 46 9.6 62 NGC 6253 9.7 27
Collinder 261 10.0 54 NGC 188 9.6 24
Berkeley 21 9.3 51 NGC 1798 9.2 24
Pismis 2 9.1 46 NGC 2141 9.2 24
Berkeley 39 9.9 43 NGC 2682 9.4 30
NGC 2158 9.0 40 NGC 7789 9.2 22
Berkeley 32 9.5 37 Berkeley 22 9.0 21
NGC 7142 9.3 37 Berkeley 31 9.3 20
Melotte 66 9.5 35      

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