The file format is layer based. For example if you have N_layers. Then the data format is
Vg , dv , N_layer , nsum(1:Nlyaer),psum(1:Nlyaer),ND/NAsum(1:Nlyaer),Trapsum , n2sum(1:Nlyaer),p2sum(1:Nlyaer),ND/NA2sum(1:Nlyaer) , n3sum(1:Nlyaer),p3sum(1:Nlyaer),ND/NA3sum(1:Nlyaer),Trap3sum