sta  cast  event     O2_net_int_prod  O2_gross_int_prod  
5    7     10020105  114              nd                 
5    13    10040109  83               214                
5    20    10060040  146              nd                 
5    26    10080208  179              341                
5    32    10100113  183              nd                 
5    39    10120045  66               335                
5    45    10140113  132              nd                 
5    51    10160124  118              230                
5    58    10180034  103              nd                 
5    65    10200222  67               nd