According to a report from the Energy Information Administration (EIA), the world is getting better, on average, at using energy to power its economic activity.

The latest numbers measure “global energy intensity” or the number of British thermal units used for every unit of gross domestic product (GDP) created. A falling energy intensity measurement doesn’t mean the world is using less energy in total—but it does mean that global economic activities are getting more efficient on the whole.

Specifically, the EIA says that global energy intensity has fallen by nearly one-third in the 25 years between 1990 and 2015. “Energy intensity has decreased in nearly all regions of the world,” the EIA says, in developed and developing countries alike.

The EIA notes that countries within the Organization for Economic Cooperation and Development (OECD) tend to be more efficient than countries outside of it. OECD countries often have newer and more energy-efficient buildings. They also all have vehicle fuel efficiency regulations, which some poorer countries don’t. And OECD countries generally have local and national governments that can afford to regulate industry.

But the biggest reason that OECD countries outpace non-OECD countries in reducing energy intensity is that they’ve moved to a more service-based economy rather than a manufacturing-based economy. “Manufacturing-focused economies tend to use more energy per dollar of GDP than service-focused economies,” the EIA says. It also notes that countries with more distance between urban centers tend to expend more energy moving goods and passengers.

The EIA also measured energy productivity, which is the inverse of energy intensity, measuring units of economic productivity for every unit of energy consumed. The world also saw significant increases here over the past two and a half decades. China came out far ahead, with a 133 percent increase in energy productivity between 1990 and 2015, largely due to the fact that increases in economic output were twice that of increases in energy consumption. The US saw a 58 percent gain in energy productivity over the same 25 years as well.