Get data usage information

{
    "Containers": [
        {
            "Command": "top",
            "Created": 1472592424,
            "HostConfig": {
                "NetworkMode": "default"
            },
            "Id": "e575172ed11dc01bfce087fb27bee502db149e1a0fad7c296ad300bbff178148",
            "Image": "busybox",
            "ImageID": "sha256:2b8fd9751c4c0f5dd266fcae00707e67a2545ef34f9a29354585f93dac906749",
            "Labels": {},
            "Mounts": [],
            "Names": [
                "/top"
            ],
            "NetworkSettings": {
                "Networks": {
                    "bridge": {
                        "Aliases": null,
                        "EndpointID": "8ed5115aeaad9abb174f68dcf135b49f11daf597678315231a32ca28441dec6a",
                        "Gateway": "172.18.0.1",
                        "GlobalIPv6Address": "",
                        "GlobalIPv6PrefixLen": 0,
                        "IPAMConfig": null,
                        "IPAddress": "172.18.0.2",
                        "IPPrefixLen": 16,
                        "IPv6Gateway": "",
                        "Links": null,
                        "MacAddress": "02:42:ac:12:00:02",
                        "NetworkID": "d687bc59335f0e5c9ee8193e5612e8aee000c8c62ea170cfb99c098f95899d92"
                    }
                }
            },
            "Ports": [],
            "SizeRootFs": 1092588,
            "State": "exited",
            "Status": "Exited (0) 56 minutes ago"
        }
    ],
    "Images": [
        {
            "Containers": 1,
            "Created": 1466724217,
            "Id": "sha256:2b8fd9751c4c0f5dd266fcae00707e67a2545ef34f9a29354585f93dac906749",
            "Labels": {},
            "ParentId": "",
            "RepoDigests": [
                "busybox@sha256:a59906e33509d14c036c8678d687bd4eec81ed7c4b8ce907b888c607f6a1e0e6"
            ],
            "RepoTags": [
                "busybox:latest"
            ],
            "SharedSize": 0,
            "Size": 1092588,
            "VirtualSize": 1092588
        }
    ],
    "LayersSize": 1092588,
    "Volumes": [
        {
            "Driver": "local",
            "Labels": null,
            "Mountpoint": "/var/lib/docker/volumes/my-volume/_data",
            "Name": "my-volume",
            "Options": null,
            "Scope": "local",
            "UsageData": {
                "RefCount": 2,
                "Size": 10920104
            }
        }
    ]
}