Overall, the percentage of people in Canada and the Netherlands fluctuated over the period, whereas the United Kingdom showed a steady increase. The USA, on the other hand, experienced a gradual but consistent rise.
In 1991, the Netherlands had the highest proportion of people, at nearly 60%, while Canada followed closely behind at around 50%. However, the percentage in the Netherlands dropped significantly to about 30% in 1998, before slightly recovering to just above 40% in 2006. Meanwhile, Canada experienced a small increase in 1998 and then a slight decline in 2006.
The United Kingdom started at approximately 30% in 1991 and remained relatively stable until 1998. After that, it witnessed a moderate increase, reaching around 35% in 2006. Similarly, the USA, which had the lowest percentage at roughly 10% in 1991, saw a steady rise throughout the period, doubling to around 20% in 1998 and continuing to increase slightly by 2006.
In summary, while Canada and the Netherlands showed fluctuations, the UK and the USA experienced overall upward trends.