How to Generate Chronological Blog Archives in Hugo?

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Here is my config

[taxonomies]
    year = "year"
    month = "month"
[permalinks]
    post = "/posts/:year/:month/:slug/"
    year = "/posts/:slug/"
    month = "/posts/:slug/"

Here is my one of the post in /posts directory (top part)

+++
title = "Cameras,Rolls,Photos and Albums"
slug = "2002-05-21-cameras-rolls-photos-and-albums"
published = 2002-05-21T14:55:00+05:30
author = "Santanu Misra"
tags = [ "Paris", "picture",]
+++

When i try to access

http://localhost:1313/posts/2002/ or http://localhost:1313/2002/

I get 404 errror