# The Arms Imports (SIPRI Trend Indicator Values)
The **Arms Imports (SIPRI Trend Indicator Values)** is an indicator developed by the **Stockholm International Peace Research Institute (SIPRI)** to measure the volume of international arms imports.
It includes purchases, aid, and transfers through manufacturing licenses for **major conventional weapons**, such as:
- **Aircraft**
- **Armored vehicles**
- **Artillery**
- **Radar systems**
- **Missiles**
- **Military-use ships**
This indicator **excludes**:
- **Small arms**
- **Light weapons**
- **Trucks**
- **Small artillery**
- **Ammunition**
- **Support equipment**
- **Technology transfers**
- **Services**
Values are expressed in **SIPRI Trend Indicator Values (TIVs) in US dollars (US$ million)**, with a **'0'** indicating that the value of imports is less than **US$0.5 million**.
# Chart
The chart displays the values of arms imports for **Yemen** in **US dollars (US$ million)** over an **18-year period, from 2000 to 2018**.