SwiftのCodableでEnumを変換する

import UIKit

enum Country: Int, Codable {
    case japan = 0
    case usa
    case france
}

struct Member: Codable {
    let id: Int
    let country: Country
}

let json = """
{
    "id": 1,
    "country": 0
}
"""

let decoded = try JSONDecoder().decode(Member.self, from: json.data(using: .utf8)!)
let country = decoded.country

switch country {
    case .japan:
        print("日本")
    case .usa:
        print("アメリカ")
    case .france:
        print("フランス")
}

print(decoded.country)