Ratio of ratio versus Ro_Br number. The filled bullets indicate the primary cycles and the empty bullets indicate the secondary cycles. The black points and the black crosses indicate the results by Saar & Brandenburg (1999) and Lehtinen et al. (2016), respectively. The red continuous line depicts the inactive sequence. The black dotted line depicts the curve inferred by Lehtinen et al. (2016) and connects the active, the transitional and the super active sequence. The Ro_Br ranges corresponding to the three sequences are indicated with the black arrows and labelled A, T, and S, respectively.