pre_text: Capital expenditures For 2019, capital expenditure was SEK 5.1 (4.0) billion, representing 2.3% of sales. Expenditures are largely related to test sites and equipment for R&D, network operation centers and manufacturing and repair operations. The increase in 2019 was mainly due to investments in 5G test equipment. Annual capital expenditures are normally around 2% of sales. This corresponds to the needs for keeping and maintaining the current capacity level. The Board of Directors reviews the Company’s investment plans and proposals. As of December 31, 2019, no material land, buildings, machinery or equipment were pledged as collateral for outstanding indebtedness.
table: Capital expenditures 2017–2019
table: SEK billion 2019 2018 2017
table: Capital expenditures 5.1 4.0 3.9
table: Of which in Sweden 2.0 1.3 1.5
table: Share of annual sales 2.3% 1.9% 1.9%
question: Analyse this data from a financial earnings document. What is the change in share of annual sales between 2018 and 2019?