pre_text: (iii) Contract balances Increases in the balance of accrued and unearned revenue during the year relate to the acquisition of Sigma Systems (refer to Note 24). Additionally, the increase in accrued revenue was a result of software licences deployed on contract inception but have yet to be billed to the customer. Revenues recognised in the current reporting period that was included in deferred revenue at the beginning of the reporting period was $22,251,000, representing support and maintenance performed during the period.
table: 2019 2018
table: $’000 $’000
table: Accrued revenue 27,817 5,824
table: Unearned revenue 27,069 22,914
question: Analyse this data from a financial earnings document. How much was the difference in unearned revenue and accrued revenue in 2019?