clear_cache             Clear the local HMRC data cache
get_corporation_tax     Download HMRC Corporation Tax receipts by type
get_fuel_duties         Download HMRC hydrocarbon oil (fuel duty)
                        receipts
get_income_tax_stats    Download HMRC Income Tax liabilities by income
                        range
get_property_transactions
                        Download monthly UK property transaction counts
get_rd_credits          Download HMRC R&D tax credit statistics
get_stamp_duty          Download HMRC stamp duty receipts
get_tax_gap             Download HMRC tax gap estimates
get_tax_receipts        Download HMRC tax receipts and National
                        Insurance contributions
get_tobacco_duties      Download HMRC tobacco duty receipts
get_vat                 Download HMRC VAT receipts
list_tax_heads          List available tax heads in the HMRC Tax
                        Receipts bulletin
tax_heads               Tax head lookup table
