I did a google search and still did not come up with the number but I found the following on an MG Financial site:
Other factors: Due to the proximity of the Swiss economy to the eurozone (specifically Germany), the Swiss franc has exhibited a considerably positive correlation with the euro. The relationship is most prominent in the highly negative correlation between USD/chf and EUR/USD. To illustrate, a sudden move in EUR/USD (triggered by a major fundamental factor) is most likely to cause an equally sharp move in USD/chf in the opposite direction. The relationship between these two currency pairs is one the strongest in currency markets.
Other factors: Due to the proximity of the Swiss economy to the eurozone (specifically Germany), the Swiss franc has exhibited a considerably positive correlation with the euro. The relationship is most prominent in the highly negative correlation between USD/chf and EUR/USD. To illustrate, a sudden move in EUR/USD (triggered by a major fundamental factor) is most likely to cause an equally sharp move in USD/chf in the opposite direction. The relationship between these two currency pairs is one the strongest in currency markets.