pre_text: 4. SEGMENT INFORMATION During the 2019 and 2018 financial years, the Group operated wholly within one business segment being the operation and management of storage centres in Australia and New Zealand. The Managing Director is the Group’s chief operating decision maker and monitors the operating results on a portfolio wide basis. Monthly management reports are evaluated based upon the overall performance of NSR consistent with the presentation within the consolidated financial statements. The Group’s financing (including finance costs and finance income) are managed on a Group basis and not allocated to operating segments. The operating results presented in the statement of profit or loss represent the same segment information as reported in internal management information. The revenue information above excludes interest income and is based on the location of storage centres.
table: 2019 2018
table: $'000 $'000
table: Revenue from external customers
table: Australia 144,621 129,431
table: New Zealand 13,036 8,912
table: Total 157,657 138,343
question: Analyse this data from a financial earnings document. What is the average revenue from New Zealand for 2018 and 2019?