6427.0 Producer Price Indexes, AustraliaTable 24. Output of the Professional, scientific and technical services industries, group and class index numbersIndex Numbers ;  6922 Surveying and mapping services ; (unit: Index Numbers, series type: Original, data type: Index, frequency: Quarter, collection month: 3, since: Dec-1997)
.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 A2314199R : column 5, table 6427024, 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