| Año | Valor |
|---|---|
| 1960-01-01 | 836072705.361940 |
| 1961-01-01 | 918332548.766931 |
| 1962-01-01 | 915716527.887097 |
| 1963-01-01 | 1074641379.821310 |
| 1964-01-01 | 1379539070.270270 |
| 1965-01-01 | 1694255986.418060 |
| 1966-01-01 | 1844919323.833730 |
| 1967-01-01 | 2159744414.571920 |
| 1968-01-01 | 2074648756.114290 |
| 1969-01-01 | 2242886806.489490 |
| 1970-01-01 | 2454666460.398230 |
| 1971-01-01 | 2429011577.078090 |
| 1972-01-01 | 2700985870.876490 |
| 1973-01-01 | 3067556428.199530 |
| 1974-01-01 | 3715775469.890250 |
| 1975-01-01 | 2712983819.866530 |
| 1976-01-01 | 3106171260.357450 |
| 1977-01-01 | 3003257222.431240 |
| 1978-01-01 | 2594841688.151930 |
| 1979-01-01 | 3015193060.742900 |
Fuente: World Bank