The book value of loans and borrowings consist of the following:
| Loans and borrowings | 2017 | 2016 | 2015 | |||||||||
| Non-current | ||||||||||||
| Bank loans | $ | – | $ | 4,179,528 | $ | 4,301,125 | ||||||
| Finance lease creditor | 17,148,421 | 16,054,972 | 16,518,357 | |||||||||
| Other loans | 997,826 | 875,816 | 901,297 | |||||||||
| Total non-current | 18,146,247 | 21,110,316 | 21,720,779 | |||||||||
| Current | ||||||||||||
| Revolving lines of credit | 812,913 | 711,675 | 680,075 | |||||||||
| Bank loans | 1,604,426 | 1,683,705 | 1,660,946 | |||||||||
| Finance lease creditor | 1,131,182 | 921,634 | 1,856,354 | |||||||||
| Other loans | 889,833 | 889,833 | 889,833 | |||||||||
| Total current | 4,438,354 | 4,206,847 | 5,087,208 | |||||||||
| Total loans and borrowings | $ | 22,584,601 | $ | 25,317,163 | $ | 26,807,987 | ||||||