Years	Actual output	Predicted value				Absolute error
Years	Actual output	α = 0.1	α = 0.3	α = 0.5	α = 0.9	α = 0.1	α = 0.3	α = 0.5	α = 0.9
2011	15.10	15.93	15.93	15.93	15.93	0.83	0.83	0.83	0.83
2012	15.20	15.85	15.68	15.52	15.18	0.65	0.48	0.32	0.02
2013	17.50	15.79	15.54	15.36	15.20	1.72	1.96	2.14	2.30
2014	19.70	15.96	16.13	16.43	17.27	3.74	3.57	3.27	2.43
2015	19.60	16.33	17.20	18.06	19.46	3.27	2.40	1.54	0.14
2016	18.30	16.66	17.92	18.83	19.59	1.64	0.38	0.53	1.29
total						11.85	9.63	8.63	7.01
average						1.98	1.61	1.44	1.17