Take your pick and divide by 2. If a day over you're past "middle age".

Pete
Life Expectancy 2011
Overall Male Female
? South Africa 58.26 56.74 59.63
? Nigeria 53.20 52.30 54.11
1 Japan 82.70 79.45 85.82
2 Switzerland 82.59 80.30 84.69
3 San Marino 82.56 81.98 83.28
4 Italy 82.38 79.83 84.74
5 Singapore 82.35 80.12 84.58
6 Iceland 82.30 80.30 84.00
7 Andorra 82.22 79.03 85.36
8 Australia 82.16 79.99 84.33
9 Spain 82.10 79.00 85.15
10 Qatar 82.08 81.31 83.27
11 Israel 82.05 80.19 83.76
12 Monaco 81.89 78.57 85.09
13 France 81.77 78.46 84.95
14 Sweden 81.74 79.79 83.62
15 Canada 81.54 79.50 83.50
16 Luxembourg 81.52 79.06 83.77
17 Cyprus 81.48 79.39 83.68
18 Norway 81.40 79.27 83.45
19 New Zealand 81.30 79.42 83.09
20 Netherlands 81.20 79.18 83.06
21 Austria 81.10 78.39 83.65
22 Greece 80.94 78.27 83.64
23 Ireland 80.73 78.64 82.78
24 South Korea 80.72 77.35 83.86
25 Finland 80.71 77.59 83.78
26 Germany 80.66 78.29 82.99
27 United Kingdom 80.49 78.50 82.40
28 Belgium 80.40 77.79 82.92
29 Malta 80.38 78.78 81.98
30 Slovenia 80.12 76.60 83.42
31 Portugal 80.08 76.96 83.10
32 Kuwait 79.86 79.54 80.37
33 Denmark 79.46 77.38 81.50
34 Chile 79.28 76.17 82.34
35 Costa Rica 79.14 77.02 81.34
36 Bahrain 78.72 77.67 80.09
37 United States 78.57 76.12 80.93
38 Cuba 78.29 76.38 80.26
39 Czech Republic 78.07 74.99 81.07
40 Barbados 77.59 74.63 80.37
41 Colombia 77.54 74.49 80.52
42 Brunei Darussalam 77.36 76.29 78.50
43 Croatia 77.19 74.01 80.27
44 Cook Islands 77.09 72.95 82.08
45 Peru 76.79 75.25 78.30
46 Panama 76.76 73.98 79.74
47 Maldives 76.59 75.67 77.61
48 Uruguay 76.57 73.00 79.98
49 Estonia 76.49 71.15 81.30
50 Poland 76.36 72.17 80.52
51 Bosnia and Herzegovina 76.22 74.05 78.39
52 Slovakia 76.04 72.32 79.62
53 Ecuador 75.96 73.20 78.84
54 Argentina 75.80 72.45 79.05
55 Turkey 75.67 73.29 78.07
56 United Arab Emirates 75.67 74.97 76.69
57 Montenegro 75.63 73.19 78.05
58 Tunisia 75.61 73.58 77.73
59 China 75.56 74.05 77.17
60 Venezuela 75.48 71.96 79.25
61 Saudi Arabia 75.33 73.72 77.34
62 Macedonia 75.19 73.11 77.31
63 Vietnam 75.19 73.06 77.16
64 Syria 75.18 73.23 77.21
65 Bahamas 75.17 72.21 77.93
66 Hungary 75.12 71.27 78.77
67 Saint Lucia 75.01 71.43 78.66
68 Mexico 74.98 72.25 77.74
69 Antigua and Barbuda 74.91 73.25 76.50
70 Jamaica 74.78 71.46 78.23
71 Sri Lanka 74.56 71.18 78.11
72 Paraguay 74.52 71.71 77.61
73 Dominica 74.43 71.96 76.98
74 Serbia 74.35 71.77 77.04
75 Brazil 74.33 70.97 77.75
76 Bulgaria 74.27 70.80 77.79
77 Grenada 74.15 71.25 77.13
78 Saint Kitts and Nevis 74.02 70.81 77.44
79 Romania 74.02 70.29 77.82
80 Albania 74.01 70.74 77.38
81 Honduras 74.01 71.92 76.18
82 Thailand 74.01 70.74 77.38
83 Malaysia 73.94 71.69 76.42
84 Albania 73.93 72.61 75.30
85 Mauritius 73.90 70.14 77.79
86 Latvia 73.77 68.78 78.40
87 Lebanon 73.77 71.82 75.69
88 Lithuania 73.76 68.21 79.13
89 Saint Vincent and the Grenadines 73.69 71.41 76.09
90 Belize 73.63 71.26 76.12
91 Seychelles 73.59 69.31 78.23
92 Jordan 73.50 72.23 74.89
93 Iran 73.40 71.76 75.16
94 Egypt 73.34 71.34 75.38
95 Algeria 72.97 71.44 74.47
96 Nicaragua 72.89 70.08 75.73
97 Samoa 72.82 69.66 76.37
98 Dominican Republic 72.64 71.95 73.34
99 Suriname 72.41 69.41 75.51
100 Oman 72.30 70.36 75.62
101 Morocco 72.24 70.16 74.37
102 Niue 72.22 65.22 82.26
103 Vanuatu 72.20 70.57 74.06
104 Georgia 72.09 68.22 75.84
105 El Salvador 71.80 67.55 75.69
106 Tonga 71.71 72.98 70.50
107 Palau 71.68 67.61 76.55
108 Cape Verde 71.65 67.56 75.67
109 Nauru 71.49 67.96 75.78
110 Belarus 71.47 65.56 77.44
111 Azerbaijan 71.41 68.69 74.07
112 Armenia 71.27 67.16 75.08
113 Moldova 70.80 66.75 74.84
114 Trinidad and Tobago 70.80 66.46 75.16
115 Ukraine 70.56 65.42 75.53
116 Fiji 69.56 67.03 72.41
117 Bangladesh 69.52 68.81 70.25
118 Solomon Islands 69.50 68.32 70.74
119 Indonesia 69.47 67.88 71.05
120 Philippines 69.40 66.40 72.52
121 Guatemala 69.36 65.85 72.78
122 Iraq 68.91 65.45 72.36
123 Russia 68.85 62.97 74.82
124 Kyrgyzstan 68.82 65.30 72.40
125 North Korea 68.77 65.43 71.92
126 Micronesia 68.57 67.25 69.91
127 Uzbekistan 68.26 65.76 70.83
128 Nepal 68.25 67.28 69.12
129 Mongolia 68.06 63.77 72.70
130 Laos 67.90 66.48 69.28
131 Tajikistan 67.89 66.89 68.90
132 Bhutan 67.40 65.80 69.27
133 Kiribati 67.33 64.64 70.64
134 Bolivia 67.19 65.15 69.23
135 Kazakhstan 67.00 62.26 71.67
136 Pakistan 66.57 65.52 67.70
137 Madagascar 66.50 64.93 68.09
138 Botswana 65.71 64.07 67.27
139 India 65.46 63.81 67.30
140 Myanmar 65.23 63.42 67.05
141 Namibia 65.17 63.73 66.46
142 Libya 65.14 58.14 74.08
143 Cambodia 65.12 63.53 66.47
194 Sierra Leone 46.53 46.02 47.03