Prices for petroleum and primary metal products caused prices for manufactured goods to surge in March. Raw material prices were pushed up mainly by prices for non-ferrous metals.
; From February to March, prices charged by manufacturers, as measured by the Industrial Product Price Index (IPPI), registered a fifth consecutive monthly increase. The  ; 1.3% rise in the index mainly reflected the strength of prices for petroleum and coal products and primary metal products.   ; On a 12-month basis, the IPPI rose by  ; 4.8%, the strongest advance since October  ; 2004. The upward pressure came largely from higher prices for primary metal products and petroleum and coal products. The upward movement was tempered by a drop in prices for lumber and other wood products.   ; From February to March, the Raw Materials Price Index (RMPI) rose  ; 1.3%, down from the  ; 2.5% increase observed in February. The monthly increase in the index was mainly attributable to non-ferrous metals. All raw material groups posted gains, except for vegetable products and non-metallic minerals.   ; Compared to March of last year, raw materials cost plants  ; 9.7% more, a rate of increase greater than those posted in January and February. The rise in the index was mainly led by non-ferrous metals and was slowed by mineral fuels.   ; In March, the IPPI was  ; 117.9  ; (1997=100), up from February's level of  ; 116.4. The RMPI was  ; 167.2  ; (1997=100), up from February's revised level of  ; 165.0.