Table B.—Price Weights for Most Recent Estimates

Following annual NIPA revision in:	Price weights for quarterly estimates are from the years shown/1/
	1990		1991				1992				1993				1994				1995				1996
	III	IV	I	II	III	IV	I	II	III	IV	I	II	III	IV	I	II	III	IV	I	II	III	IV	I
A. Chain-type annual-weighted index
1992	1990, 1991				1991
1993					1991, 1992				1992
1994									1992, 1993				1993
1995									1992, 1993				1993, 1994				1994
B. Benchmark-years-weighted index
1992	1987, 1991
1993	1987, 1992								1992
1994									1992, 1993
1995									1992, 1994

NOTE.—The solid vertical lines indicate points from which the quarterly estimates are "centered," as described in the text. The dotted vertical lines indicate quarters through which price weights introduced in a given annual NIPA revision extend. Annual revisions usually coincide with the release of estimates for the second quarter of the year. Therefore, the annual price weights introduced in an annual revision will be used only through the first quarter of the following year. Note that the price weights for recent years are subject to revision in subsequent annual NIPA revisions.

1. For clarification, consider the following two examples:

(a) For the chain-type annual-weighted index, following the annual NIPA revision in 1992, the estimates for the third quarter of 1990 through the second quarter of 1991 are calculated using price weights from 1990 and 1991.

(b) For the benchmark-years-weighted index, following the annual NIPA revision in 1994, the estimates for the third quarter of 1992 through the first quarter of 1995 will be calculated using price weights from 1992 (the most recent benchmark year) and 1993 (the most recently available year).