Because I thought it was pretty much self-evident.
What was the cost of a Big Mac 5-10 years ago? A box of cereal? A car? Your electric rates? A pair of socks? A pizza? House prices? Rent?
The point is that most of everything we use to live on has risen in price--the value of a dollar is less because one dollar buys less of common consumer goods. I'm not talking about investment in a metal.
You're asking me and you don't know.
When we talk inflation we look at prices first and only after we see them do we decide what the trend is. In the mean time what we do have is that the dollar is not being devalued and in fact it's increasing in value on the international exchange markets. You can say we got inflation internally if you want but if you're talking "inflation" it's believable only when you're also pointing to an actual list of a basket of prices.