| Año | Valor |
|---|---|
| 1980-01-01 | 2650.024891 |
| 1981-01-01 | 2599.016218 |
| 1982-01-01 | 2442.725043 |
| 1983-01-01 | 2294.061341 |
| 1984-01-01 | 2241.055412 |
| 1985-01-01 | 2157.358600 |
| 1986-01-01 | 2058.111828 |
| 1987-01-01 | 2064.796627 |
| 1988-01-01 | 2080.311603 |
| 1989-01-01 | 2113.926866 |
| 1990-01-01 | 2165.894582 |
| 1991-01-01 | 2232.940588 |
| 1992-01-01 | 2223.871841 |
| 1993-01-01 | 2273.272874 |
| 1994-01-01 | 2333.761748 |
| 1995-01-01 | 2397.228305 |
| 1996-01-01 | 2455.915278 |
| 1997-01-01 | 2531.460718 |
| 1998-01-01 | 2612.245191 |
| 1999-01-01 | 2577.993940 |
Fuente: World Bank