pre_text: NOTE 15. ACCRUED EXPENSES AND OTHER PAYABLES Accrued expenses and other payables consist of the following: Personnel-related items comprise accrued management bonuses, accrued vacation days, accrued wage tax, social securities and pension premiums. Deferred revenue consists of the revenue relating to the undelivered elements of the arrangements, see Note 21 for more information. This part of revenue is deferred at their relative selling prices until delivery of these elements. Other includes accruals for VAT, other taxes and invoices to be received for goods and services.
table: December 31,
table: 2018 2019
table: Personnel-related items 32,636 45,318
table: Deferred revenue 28,255 32,146
table: Financing related items – 3,912
table: Current portion of lease liabilities – 7,002
table: Advanced payments from customers 25,382 47,601
table: Supplier related items 1,828 2,175
table: Marketing related items 1,049 1,365
table: R&D projects 1,209 1,109
table: Other 8,634 9,215
table: Total accrued expenses and other payables 98,993 149,843
question: Analyse this data from a financial earnings document. What is the change in Personnel-related items from 2018 to 2019?