The real limit is: 2 Gb back-end file. In that file, you must consider having a few hundred or maybe a few thousand bytes for the hidden MSys* tables. After that, your limit is based on the size of the records. You can have as many records as will fit in 2Gb, taking into account that if you have a short key field, (i.e. INTEGER as opposed to LONG) you might have a limit imposed by the key's format. Note also that each index you add will take up not less than the size of the key field plus about 8-12 bytes in the index tables per record.
No record can exceed 2048 bytes, so 71,000 records cannot exceed 142,000,000 (rounded) bytes. This is less than the 2GB limit by quite a bit. You should be fine with that data size.