如何在站点上实现实时和持久数字计数器

I have a client who recycles cans. We're developing a new web site for them and they want a live "cans processed" counter on their site. The starting number (since they've been in operation for a while) will be around 50,000,000, and there's not an ending number.I have a client who recycles cans. We're develo