Table 1 Number of people facing low, moderate, significant, and severe water scarcity during a given number of months per year, for the average year in the period 1996–2005.

Number of
months per
year (n)
Billions of people facing low, moderate, significant, and
severe water scarcity during n months per year
Billions of people
facing moderate or
worse water scarcity
during at least n months
per year
Billions of people
facing severe
water scarcity
during at least n
months per year
Low
water
scarcity
Moderate
water
scarcity
Significant
water
scarcity
Severe water
scarcity
00.544.985.222.076.046.04
10.120.810.660.314.263.97
20.120.190.130.373.953.66
30.350.050.030.373.553.28
40.330.010.0010.593.152.91
50.30000.552.562.32
60.33000.272.091.78
70.47000.211.761.50
80.59000.291.461.30
90.40000.301.131.01
100.40000.120.780.71
110.30000.090.660.59
121.78000.500.540.50
Total6.046.046.046.04