Custom Duties.
They are the principal revenue of the Republic. From the year 1882 to the year 1891, the product of the custom duties, calculated by periods of five years each, has been:
| 1882, | $5,501,360 |
| 1883, | 6,968,321 |
| 1884, | 7,749,438 |
| 1885, | 7,731,264 |
| 1886, | 6,803,761 |
| ————— | |
| Total, | $34,754,144 |
| 1887, | $ 8,671,243 |
| 1888, | 8,845,776 |
| 1889, | 10,786,602 |
| 1890, | 9,848,735 |
| 1891, | 8,648,509 |
| ————— | |
| Total | $46,800,865 |
The increase of the second period, if compared with the first one, has been: $12,046,721.