The following tables shows the breakdown of the third-party commitments and contractual obligations as of December 31, 2018 and 2017:

2018	Total		2019		2020 and 2021		2022 and 2023		Subsequent

Corporate debt		684,073		268,905		107,560		205,258		102,350
Loans with credit institutions (project debt)		4,314,307		233,214		476,191		571,374		3,033,528
Notes and bonds (project debt)		776,807		31,241		49,445		54,879		641,242
Purchase commitments		3,082,495		131,417		264,461		259,775		2,426,842
Accrued interest estimate during the useful life of loans		2,743,132		314,984		565,040		492,932		1,370,176

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