5206.0 Australian National Accounts: National Income, Expenditure and ProductTable 6. Gross Value Added by Industry, Chain volume measuresProfessional, scientific and technical services (M) ;  Computer system design and related services ; (unit: $ Millions, series type: Seasonally adjusted, data type: Derived, frequency: Quarter, collection month: 3, since: Sep-1994)
.The graph was plotted with gnuplot, and shows both the raw data (black points), and a trend constructed from a weighted cubic spline with a weighting of 1e-22 (red line).
This image is based on Australian Bureau of Statistics data.The underlying data is from series A85231764C : column 152, table 5206006_industry_gva, available as part of a set with analysis, metadata and explanatory notes, or in the Excel file,  and is licensed under the Creative Commons Attribution 2.5 license (Australia).
Toby Hudson