($million)		Share of total
	1991	2019	Percent Change	1991	2019
Australia	2,944	8,896	202.2%	19%	15%
UK	1,024	1,572	53.5%	6%	3%
Europe (excl. UK)	2,018	4,438	119.9%	13%	7%
USA	2,047	5,640	175.5%	13%	9%
Americas (excl. USA)	712	2,041	186.7%	5%	3%
China	186	15,621	8104.8%	1%	26%
Japan	2,611	3,574	36.9%	17%	6%
Asia (excl. China & Japan)	2,566	11,884	363.1%	16%	20%
All other countries	1,664	5,712	264.8%	11%	10%
All Merchandise trade	15,772	59,378	276.5%	100%	100%

The value for the "All Merchandise" export price index for the year ended June 1991 was 831 (June 2002=1000). Find the 2019 price index and calculate a percentage change in the real value of merchandise exports between 1991 and 2019. In what period's prices have you measured real exports? What does the percentage change mean?