Using Kubernetes for the deployment, management and scaling of containerized applications has become a common practice. To facilitate the installation and management of these applications on Kubernetes clusters, practitioners can use the Helm package manager. Helm enables defining, installing and upgrade complex Kubernetes applications in an easy and organized way through Charts. Our goal is to support chart developers and users by assessing the state and evolution of publicly available charts, as well as the outdatedness and security risks of their images. For 9,482 charts that are distributed via the Artifact Hub repository, we mine and collect the list of their metadata, versions, dependencies, maintainers and container images. Then, we carry out an empirical analysis into seven aspects. We found that the ecosystem forming around Helm Charts ecosystem is growing fast. However, most of the Charts are not official with no popularity and no license. We also observed that charts tend to release multiple versions, but around half of them are still in the initial development phase. When looking at the container images used in charts, we found that around half of them are outdated and 88.1% of them are exposed to vulnerabilities, jeopardizing 93.7% of the charts.