| Año | Valor |
|---|---|
| 1976-01-01 | -1.957305 |
| 1977-01-01 | -3.651229 |
| 1978-01-01 | -8.816255 |
| 1979-01-01 | -8.801685 |
| 1980-01-01 | -0.143809 |
| 1981-01-01 | -8.092871 |
| 1982-01-01 | -3.100230 |
| 1983-01-01 | -2.601289 |
| 1984-01-01 | -2.882156 |
| 1985-01-01 | -5.305660 |
| 1986-01-01 | -9.816250 |
| 1987-01-01 | -9.941130 |
| 1988-01-01 | -6.620742 |
| 1989-01-01 | -5.727344 |
| 1990-01-01 | -4.086217 |
| 1991-01-01 | -4.914600 |
| 1992-01-01 | -9.459823 |
| 1993-01-01 | -8.814760 |
| 1994-01-01 | -1.508053 |
| 1995-01-01 | -4.504731 |
Fuente: World Bank