From the study:
http://www.stephenjaygould.org/ctrl/news/file002.html
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Belief in personal God</td> <td align="Center" bgcolor="#F0f0f0">
1914</td> <td align="Center" bgcolor="#F0f0f0">
1933</td> <td align="Center" bgcolor="#F0f0f0">
1998</td></tr> <tr><td bgcolor="#Fcfcfc">Personal belief</td> <td> 27.7</td> <td> 15</td> <td> 7.0</td></tr> <tr><td bgcolor="#Fcfcfc">Personal disbelief</td> <td> 52.7</td> <td> 68</td> <td> 72.2</td></tr> <tr><td bgcolor="#Fcfcfc">Doubt or agnosticism</td> <td> 20.9</td> <td> 17</td> <td> 20.8</td></tr> <tr><td>
</td></tr> <tr><td bgcolor="#d0d0d0">
Belief in human immortality </td> <td align="Center" bgcolor="#F0f0f0">
1914</td> <td align="Center" bgcolor="#F0f0f0">
1933</td> <td align="Center" bgcolor="#F0f0f0">
1998</td></tr> <tr><td bgcolor="#Fcfcfc">Personal belief</td> <td> 35.2</td> <td> 18</td> <td> 7.9</td></tr> <tr><td bgcolor="#Fcfcfc">Personal disbelief</td> <td> 25.4</td> <td> 53</td> <td> 76.7</td></tr> <tr><td bgcolor="#Fcfcfc">Doubt or agnosticism</td> <td> 43.7</td> <td> 29</td> <td> 23.3</td></tr></tbody></table>