Table 1: Results of Voigt-profile fitting.
Name n $z_{\rm abs}$ log N(H  I) log N(O  I) $\sigma$ [O/H] log N(N  I) $\sigma$ [N/H]
      (cm-2) (cm-2)     (cm-2)    
Q 0102-190 1 2.92646 20.00$\pm$0.10 14.68 0.16   12.67 0.11  
  2 2.92661   14.66 0.17   <12.35 d  
  3 2.92727   14.20 0.02   12.38 0.09  
  4 2.92771   14.41 0.02   12.55 0.06  
  Tot     15.13 0.08 -1.56 12.76 0.11 -3.07
Q 0112-306 1 2.41844 20.50$\pm$0.08 14.78 0.12   12.66 0.08  
  2 2.41861   14.45 0.06   12.99 0.04  
  Tot     14.95 0.08 -2.24 13.16 0.04 -3.17
Q 0347-383a 1 3.02463 20.73$\pm$0.05 16.12 0.12   14.15 0.03  
  2 3.02485   16.18 0.18   14.47 0.03  
  Tot     16.45 0.11 -0.97 14.64 0.02 -1.92
Q 0841+129 1 2.47622 20.80$\pm$0.10 16.09 0.03 -1.40 13.94 0.02 -2.69
Q 0913+072b 1 2.61829 20.35$\pm$0.10 14.08 0.02   <12.10 d  
  2 2.61844   14.43 0.02   <12.20    
  Tot     14.59 0.02 -2.45 <12.45   <-3.73
Q 1108-077 1 3.60767 20.37$\pm$0.07 15.37 0.03 -1.69 <12.84 d <-3.36
Q 1337+113 1 2.50793 20.12$\pm$0.05 14.90 0.10 -1.91 12.84 0.10 -3.11
Q 1337+113 1 2.79557 21.00$\pm$0.08 15.21 0.12   <12.40 d  
  2 2.79581   15.59 0.08   13.98 0.03  
  Tot     15.74 0.07 -1.95 13.99 0.03 -2.84
Q 1340-136 1 3.11835 20.05$\pm$0.08 15.52 0.02 -1.22 13.28 0.02 -2.60
Q 1409+095c 1 2.45595 20.53$\pm$0.08 15.05 0.02   <13.26 d  
  2 2.45644   15.00 0.02   <13.14    
  Tot     15.33 0.02 -1.89 <13.51   <-2.85
Q 1409+095c 1 2.66821 19.80$\pm$0.08 15.18 0.02 -1.31 13.50 0.02 -2.13
Q 2059-360 1 3.08262 20.98$\pm$0.08 15.63 0.06   13.49 0.02  
  2 3.08293   15.85 0.05   13.71 0.02  
  3 3.08316   15.02 0.12   12.85 0.14  
  Tot     16.09 0.04 -1.58 13.95 0.02 -2.86
Q 2332-094 1 3.05633 20.50$\pm$0.07 14.97 0.02   <12.93 d  
  2 3.05658   14.46 0.03   <12.93 d  
  3 3.05677   14.71 0.07   <12.93 d  
  4 3.05690   15.32 0.02   <12.93 d  
  5 3.05723   15.67 0.04   13.73 0.03  
  6 3.05737   14.66 0.04   <12.93 d  
  Tot     15.95 0.02 -1.24 13.73 0.03 -2.60
$\textstyle \parbox{14.5cm}{ $^a$\space Also Ledoux et~al. (\cite{Ledoux2003}); ... ...ttini et~al. (\cite{Pettini2002}); $^d$\space $3\sigma$\space detection limit.}$


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