Flat glass prices saw another slight increase in November, ticking up 0.2 percent for the month after a 0.1-percent increasing in October, according to the latest Producer Price Index report release by the Bureau of Labor Statistics (BLS).

Prices in the category are up 3.7 percent from a year ago, and the current index sits at 132.5.

According to the BLS, the PPI program measures the average change over time in the selling prices received by domestic producers for their output. The prices included in the PPI are from the first commercial transaction for many products and some services.

Final demand for construction followed its 0.7-percent price uptick in October with a 0.1-percent increase in October. Those process are up 0.9 percent over the last three months but 0.8 percent compared to November 2015. Prices for materials and components for construction were flat for the second time in three months but have increased 1.1 percent from a year ago.

Construction machinery and equipment prices edged up 0.2 percent in November and are up 1 percent from the same time last year. Prices for structural, architectural and pre-engineered metal products dipped 1.3 percent for the month and are down by the same margin from November 2015.

Architectural and engineering services saw a 0.4-percent increase in prices, following a 0.5 percent jump in October. These prices are up 1.6 percent over the year.

In another report, glass and glassware index import prices fell 0.1 percent in November for the second straight month and have ticked down just 0.2 percent from the same time last year. Export prices in the category were flat for the third time in four months but have increased 0.6 percent over the last 12 months.

Overall, the U.S.’s PPI for final demand increased 0.4 percent in November, seasonally adjusted. On an unadjusted basis, the final demand index climbed 1.3 percent for the 12 months ended November 2016. U.S. import prices fell 0.3 percent in November, and export prices also declined, edging down 0.1 percent.