Here is a graph showing how the level of uncertainty in constitutional design evolved in Canada from 1861 to 2001 (generated from Canada 39 texts 5 var.sav):

Complete data set (Lien vers Canada tous les textes.sav)
Summary statistics by text (Lien vers Canada 39 textes 5 var.sav)
Codebook (Lien vers Codebook)

Main investigator: Louis M. Imbeau
Co-Investigator: Thomas Éboutou

Related publication: Imbeau 2009; Imbeau & Jacob 2011; Imbeau & Éboutou 2015