The dollar is more valuable than the last decade? How come the Euro exchange rate changed from 2 for 1 USD (about 2010?) to 0.9 for one USD today? Did the Euro

The dollar is more valuable than the last decade? How come the Euro exchange rate changed from 2 for 1 USD (about 2010?) to 0.9 for one USD today? Did the Euro increase so much more? Without oil?