Annual figures use the observations available in the downloaded release. An unfinished year is year to date: flow sums are partial totals, averages cover available periods, and stock values are the latest available observation. Different series have different reporting lags. Partial years are included in decade averages and historical ranks, so these comparisons are provisional. Historical joins may combine different frequencies and definitions; records describe the assembled series, not a perfectly consistent survey across its entire span.
1. Direct Primary-Source Ingestion
Indicators are extracted programmatically from ABS SDMX-REST endpoints, ABS historical spreadsheets, RBA statistical CSVs and historical spreadsheets, World Bank Open Data and the ECB reference-rate archive. We calculate growth rates, annual summaries and exchange-rate cross-rates, and join historical series. Missing observations are not interpolated.
Where an indicator is not yet available for an early historical year (for example, the Wage Price Index prior to 1998), Historical Year pages explicitly mark the observation as unavailable rather than back-casting or estimating.
2. Annual Aggregation Rules
Because primary economic series are published at different frequencies (monthly, quarterly, semi-annual, or as-announced), annual summary tables apply the standard economic convention for each variable type:
- Rates, Yields & Price Indexes: Calendar-year mean of published observations (with the last available published period for policy target rates; monthly data may be period averages).
- Flow Volumes & Turnover (GDP, Exports, Retail, Approvals): Calendar-year sum of quarterly or monthly flows.
- Stock & Balance Sheet Series (Population, Net Worth, Debt): Last available observation in each calendar year (December / Q4 when available).
3. Long-Run Historical Splicing (1901–2026)
For foundational national series, modern quarterly/monthly ABS series are joined with official historical archives at the cutovers below. Early archival observations retain their original reference periods, which can be financial years or particular survey months rather than calendar-year averages:
- Population (1901–2026): ABS Historical Population (`3105.0.65.001`, 1901–1980) + ABS Quarterly ERP (`ERP_Q`, 1981–2026).
- Unemployment (1950–2026): RBA Occasional Paper No. 8 (`4-15.xls`, 1950–1977) + ABS Monthly Labour Force (`H5`/`LF`, 1978–2026).
- 10-Year Bond Yields (1949–2026): RBA Occasional Paper No. 8 (`3-23.xls`, 1949–1968) + RBA Historical Table F2 (`1969–2013`) + RBA Table F2.1 (`2013–2026`).
4. CPI Purchasing Power & Calculators
The Australian Inflation Calculator and Wage Growth vs Inflation Tool use the RBA/ABS long-run Consumer Price Index (`GCPIAG`, All Groups, reference base September 2025 = 100) spanning 1922 to 2026.
Real purchasing power comparisons divide the nominal wage index change by the corresponding CPI ratio over the selected start and end years.