Sorry, I thought you wanted both points substantiated. I said in my post that I had not seen the actual reports. That means I did not vouch for the claim, but merely put forth what I had noted in the news. Now, I have not only read the site to which you linked, but have looked at the stats.
One site for the stats:
http://www.guttmacher.org/pubs/Religion-and-Contraceptive-Use.pdf.
If they are hard to access that way, go to: National Health Statistics Report, Ananji Chandra et al, Mar 3, 2011, which provides the Guttmacher Institute publication RK Jones and J Dreweke, Countering and unpublished tabulations of the 2006-2008 National Survey of Family Growth, Conventional wisdom: New evidence on religion and contraceptive use (NY: Guttmacher Institute, 2011).
Based on the stats, the proper statement would be that, of self-identified Catholic women who are not pregnant, post-partum, or trying to get pregnant, 87% are using contraceptive methods not approved by the Catholic church, 11% are using no method, and 2% are using natural method (i.e., the rhythm method). The proper statement is that 87% of self-identified Catholic women are using methods of BC that the Catholic church says are wrong.
Who cares about the difference between 87%, 90%, and 98%? The Catholic church wants women to get married, have sex without any BC but the rhythm method, produce lots of children, stay home, and raise them. It does not want women to work, though most women need to work even if they would rather stay home because their husbands do not make a sufficient living for their families. Some women just want to have careers. Some women do not want to produce lots of children because it is terrible for the health of most women to produce more than two or three, and it is bad for the health of many women to produce two or three. The Catholic church does not care even if an 11-year-old victim of forcible rape will be permanently paralyzed from the neck down and become permanently psychotic if she is forced to give birth: it just wants babies out of females even if they said "no." It thinks women are human breeding cattle, but most of the women themselves don't think they are. Not surprising.