[american colleen]

.

[american colleen]

PS. Is there a cooler name than "Kowalski"?

[Hermann the Cherusker]

There has probably been a similar decline in the percentage of active Catholics during these same years, but this is harder to measure accurately.

Some dioceses do keep track of this. On the Philadelphia Archdiocesean website, you can see statistics showing a decline in percentage participation in certain areas of the diocese (especially poorer neighborhoods).