Poloidal magnetic field distributed into different configurations throughout the six epochs (2007.67, 2008.71, 2009.54, 2010.62, 2011.67, and 2013.68). The fraction of the poloidal magnetic energy stored as dipole is shown in black, quadrupole in green and octopole in blue. The red line represents the fraction of the poloidal energy stored in the axisymmetric component. The error bars associated with each epoch are shown in Table 2.