Combined Prediction of Clean Energy Consumption in China Based on the Nonlinear Programming Model

Table 1

Total clean energy consumption from 2000 to 2019 (10,000 tons of standard coal).

year	Total clean energy consumption
2000	13961.58
2001	16799.08
2002	17805.58
2003	19117.05
2004	22797.82
2005	25614.17
2006	28933.17
2007	32701.41
2008	37832.09
2009	40335.12
2010	48326.83
2011	50315.59
2012	58310.01
2013	64621.52
2014	72387.02
2015	77382.9
2016	84984.71
2017	93294.03
2018	102544
2019	113724