The raw level of PBS's weekly Sensitive Price Indicator — base 2015-16=100 — the underlying index that the SPI inflation rate is calculated from.
Source: Pakistan Bureau of Statistics, weekly. PBS embeds roughly the trailing 10 weeks in each release — there is no separate multi-year weekly archive file, so this chart shows the real, rolling recent history rather than an estimated longer series.
The SPI index is a fixed-basket price index — base 2015-16=100 — tracking the cost of 51 essential items across 17 cities. A reading of, say, 357 means that basket of goods now costs 3.57 times what it cost in the 2015-16 base period.
The index level itself isn't very meaningful in isolation; what matters is how it changes — week-over-week for short-term moves, or year-over-year for the inflation rate. That inflation rate has its own dedicated page (see Related Pages below) since it's the figure most people actually want.
PBS recalculates this index every week from freshly collected retail prices across 50 markets — it is not estimated, interpolated, or projected between releases.
The raw index is the base every other SPI figure is derived from — the week-over-week and year-over-year % changes shown elsewhere on this dashboard are both computed directly from this index level.
Tracking the index itself (rather than just the inflation rate) lets you see exactly how far prices have risen in absolute index terms since the 2015-16 base period, not just the most recent rate of change.