South Korea’s manufacturing purchasing manager index (PMI) weakened while those of major countries reached three-year highs last month.

According to PMI data on 24 countries compiled by Bloomberg Intelligence, the global manufacturing PMI came to 52-point-seven in January, unchanged from the previous month. It is the highest since February 2014 when the index hit 52-point-eight.

The PMI is an indicator of the economic health of the manufacturing sector. A reading above 50 suggests an improvement, while a reading below 50 suggests deterioration.

The United States’ manufacturing PMI marked 55 last month, the highest since March 2015, while the figure for the Eurozone came to 55-point-two, the highest since February 2014.

However, the comparable figure for South Korea weakened to 49 in January from 49-point-four from the previous month. The average rate of operation for the local manufacturing industry marked 72-point-four percent last year, the lowest since 1998.

Among the 24 countries, South Korea, Turkey, Greece and Brazil were the only countries that failed to reach the 50 level in the PMI index.