The age of wine can be determined by measuring the trace amount of radioactive tritium (3H) that is present in a sample. Tritium is formed in the upper atmosphere, and all naturally occurring water contains a small amount of 3H. However, when water is contained in a sealed wine bottle, the concentration of 3H decreases via a first-order radioactive decay with a half-life of 12.5 years. If an old bottle of wine is found to have a 3H concentration which is only 10% of that of fresh wine (which can be considered as "100%"), what is the age of the wine?