The euro fell to its lowest level against the dollar in 20 years following the release of weak economic data. On Friday afternoon, €1 was worth just $0.9707, the lowest level since late 2002. In morning trading, the euro had still been well above $0.98. The European Central Bank set the exchange rate at $0.9754 on Friday, compared to $0.9884 on Thursday. Thus, $1 cost €1.0252, compared to €1.0117 on Thursday. The currency, which has been tumbling for months, was pushed down by worsening business confidence in the eurozone. The forward-looking indicator fell to its low level in 20 months, accor…