periode_data,tahun,jumlah_pelanggan,volume_terjual
2012,1997,460641,201692913
2012,1998,487978,197593649
2012,1999,511548,207629131
2012,2000,562255,228350012
2012,2001,610806,237192219
2012,2002,649429,255161069
2012,2003,690456,274102317
2012,2004,705890,270908257
2012,2005,708919,267080481
2012,2006,725441,266221436
2012,2007,755555,252017908
2012,2008,778044,258939302
2012,2009,795149,266866640
2012,2010,805153,283965498
2012,2011,802636,297819232
2012,2012,800093,310004991
2014,1999,511548,207629131
2014,2000,562255,228350012
2014,2001,610806,237192219
2014,2002,649429,255161069
2014,2003,690456,274102317
2014,2004,705890,270908257
2014,2005,708919,267080481
2014,2006,725441,266221436
2014,2007,755555,252017908
2014,2008,778044,258939302
2014,2009,795149,266866640
2014,2010,805153,283965498
2014,2011,802636,297819232
2014,2012,800093,310004991
2014,2013,803601,314318816
2014,2014,813356,320883521