| | Country of incorporation and operation | | 2017 | | 2016 | | 2015 | | |||
| | | | % | | % | | % | | |||
| | | | | | | | | | | | |
Equity interest held by non-controlling interests: | | | | | | | | | | | | |
Sociedad Minera El Brocal S.A.A. | | Peru | | | 38.58 | | | 38.67 | | | 45.93 | |
S.M.R.L. Chaupiloma Dos de Cajamarca | | Peru | | | 40.00 | | | 40.00 | | | 40.00 | |
Minera La Zanja S.R.L. | | Peru | | | 46.94 | | | 46.94 | | | 46.94 | |
| | | | 2017 | | 2016 | | 2015 | | |||
| | | | US$(000) | | US$(000) | | US$(000) | | |||
Accumulated balances of material non-controlling interest: | | | | | | | | | | | | |
Sociedad Minera El Brocal S.A.A. | | Peru | | | 165,032 | | | 167,986 | | | 172,542 | |
Minera La Zanja S.R.L. | | Peru | | | 48,642 | | | 55,613 | | | 53,271 | |
S.M.R.L. Chaupiloma Dos de Cajamarca | | Peru | | | 1,693 | | | 1,906 | | | 2,357 | |
Apu Coropuna S.R.L. | | Peru | | | 223 | | | 678 | | | - | |
Other minor | | Chile | | | - | | | (61) | | | - | |
| | | | | 215,590 | | | 226,122 | | | 228,170 | |
| | | | | | | | | | | | |
Profit (loss) allocated to material non-controlling interest: | | | | | | | | | | | | |
S.M.R.L. Chaupiloma Dos de Cajamarca | | Peru | | | 5,827 | | | 6,950 | | | 9,244 | |
Sociedad Minera El Brocal S.A.A. | | Peru | | | 4,246 | | | (13,426) | | | (34,991) | |
Minera La Zanja S.R.L. | | Peru | | | (6,006) | | | 2,342 | | | (32,486) | |
Apu Coropuna S.R.L. | | Peru | | | (454) | | | (157) | | | (102) | |
Other minor | | Chile | | | (1) | | | (31) | | | - | |
| | | | | 3,612 | | | (4,322) | | | (58,335) | |