Calls made to the Rest API cannot exceed a period of 45 days by default.
Refer to your contract for specific clauses.
Additionally, most crossed dimensions are not available before 1 August 2012. Only single dimensions (no crossing) are available prior to this date.
For periods up to 6 months, you can launch a pre-calculation request within the Data Query interface. Once the precalculation is done, it is possible to retrieve the precalcutated data set by calling the corresponding API URL on the configured period. Please refer to the Data Query user guide for more information on this procedure: