| year | resource development | export promotion | cheap labor | access to local market | total |
| 1992 | 1 (4.3) | 11 (47.8) | 8 (34.8) | 0 (0.0) | 23 |
| 1995 | 0 (0.0) | 30 (40.5) | 27 (36.5) | 6 (8.1) | 74 |
| 2000 | 1 (1.4) | 24 (34.8) | 22 (31.9) | 4 (5.8) | 69 |
| 2005 | 6 (1.6) | 113 (29.7) | 160 (42.0) | 48 (12.6) | 381 |
| 2010 | 11 (1.4) | 164 (21.2) | 207 (26.8) | 365 (47.3) | 772 |
| 2012 | 14 (1.9) | 158 (21.0) | 275 (36.6) | 291 (38.7) | 752 |
| 2014 | 5 (0.4) | 233 (18.6) | 353 (28.2) | 640 (51.1) | 1252 |
| 1992-2014 | 169 (1.9) | 2251 (24.7) | 2982 (32.7) | 3227 (35.4) | 9114 |