Spirituality among American ethnic groups

The Inductivist cranked the GSS to figure which American ethnic groups are spiritual and which are not, and this is what he found:
Spirituality Ethnic Group
1.92 East Asians
2.78 Scandanavians
2.8 Italians
2.9 Irish
2.9 Germans
2.91 Mexicans
2.95 English/Welsh
3.12 American Indians
3.26 Blacks
3.29 Scots