Months

Seasonal variation index

Confidence limits (95%)

Dar es Salaam

Mbeya

Dar es Salaam

Mbeya

LCl

HCL

LCL

HCL

January

104.83

104.67

99.25

130.74

94.98

127.38

February

106.67

104.62

91.17

115.67

86.01

113.19

March

108.66

107.83

102.67

124.36

94.82

121.93

April

106.76

106.94

94.16

125.74

78.97

121.48

May

102.31

102.85

90.22

123.90

84.64

118.85

June

96.58

93.89

87.90

109.07

83.73

101.26

July

94.51

94.13

89.75

112.75

86.56

103.92

August

91.36

90.67

85.12

98.80

83.20

96.63

September

92.21

91.50

85.13

105.07

81.69

101.97

October

98.45

97.12

89.62

107.55

87.63

101.63

November

102.87

101.50

90.79

114.72

86.11

113.99

December

105.81

104.29

95.77

121.90

92.86

118.55