South Korea's consumer prices stayed at a 1 percent range for four straight months, the first since 1999, as pork prices fell amid the strong won and low growth.

Consumer prices rose 1.4 percent in February from a year earlier after gaining 1.5 percent in the prior month, hovering at the 1 percent level for the fourth consecutive month, Statistics Korea said in a statement on Monday. It was the first time since 1999 the prices stay below 2 percent for four months in a row.

Decline in pork prices drove the inflation lower amid the South Korean currency's appreciation and low growth that continued to curb import price growth and demand-side inflationary pressures.

Core consumer prices, which exclude volatile agricultural and oil products, increased 1.3 percent in February compared with the same month of last year. The OECD-method core CPI, excluding food and energy prices, came in at an annual rate of 1.2 percent.