[['Hydro power', '2012', '1,584'], ['Hydro power', '2011', '1,401'], ['Hydro power', '2007', '1,326'], ['Hydro power', '2002', '1,171']]
_____ was 1.171 in 2002, 1,326 in 2007, 1,401 in 2011, 1,584 in 2012