pre_text: (b) Revenue for Groups of Similar Products and Services We design, manufacture, and sell IP-based networking and other products related to the communications and IT industry and provide services associated with these products and their use. The following table presents revenue for groups of similar products and services (in millions): (1) Includes SPVSS business revenue of $168 million and $903 million for fiscal 2019 and 2018, respectively.
table: Years Ended July 27, 2019 July 28, 2018 July 29, 2017
table: Revenue:
table: Infrastructure Platforms  . $30,191 $28,322 $27,817
table: Applications . 5,803 5,036 4,568
table: Security 2,730 2,352 2,152
table: Other Products . 281 999 1,168
table: Total Product  . 39,005 36,709 35,705
table: Services 12,899 12,621 12,300
table: Total (1) $51,904 $49,330 $48,005
question: Analyse this data from a financial earnings document. What was the percentage change in total product revenue between 2018 and 2019?