The following table shows the breakdown of the third-party commitments and contractual obligations as of December 31, 2017 and 2016:

2017	Total		2018		2019 and 2020		2021 and 2022		Subsequent

Corporate debt		643,083		68,907		253,393		107,316		213,467
Loans with credit institutions (project debt)		4,628,289		215,117		457,853		539,466		3,415,853
Notes and bonds (project debt)		846,919		31,174		53,620		54,395		707,730
Purchase commitments		3,149,813		141,867		230,014		259,845		2,518,087
Accrued interest estimate during the useful life of loans		3,129,321		340,481		630,108		559,856		1,598,876

2016	Total		2017		2018 and 2019		2020 and 2021		Subsequent

Corporate debt		668,201		291,861		376,340		-		-
Loans with credit institutions (project debt)*		4,498,930		183,929		388,679		459,361		3,466,961
Notes and bonds (project debt)		831,538		27,225		49,422		48,740		706,151
Purchase commitments		2,894,146		136,032		263,398		246,904		2,247,812
Accrued interest estimate during the useful life of loans		3,356,750		332,408		617,852		543,927		1,862,563

*	According to contracted maturities.