The official death toll has varied between 22 and 43.
Since mid-October, the air quality has varied between "very poor" and "hazardous".
Over two days of hearings, the airline has varied between protesting its blamelessness and asking for help.
However, the degree to which AgNPs are removed from wastewater has varied between each study.
The approximate duration of the review cycle has varied between countries from 3-4 years to >6 years.
From 1999 and to the present, eruptive activity has varied between intermittent periods of low to moderate Strombolian-style eruptive activity to notable Vulcanian and sub-Plinian events.
The measured level of the lava has varied between 22 and 210 m below the floor of Halema'uma'u Crater, and in 2013 was typically 30 50 m below.
2) that the training load during the observation period has varied between participants without this being taking into account in the analyses.
Minimum early retirement age in Europe has varied between the early 50s and the early 60s during the past twenty years.
Since 1999 the eruptive activity of Tungurahua volcano has varied between volcano explosivity index (VEI) levels of <1 to 3, generally allowing the continuance of tourism, agricultural, and other economic activities around the volcano´s edifice.
Skilled and business migrants currently account for about half of residence approvals, a figure that has varied between around one-half and three-quarters over at least the past 15 years.
